Metric Converter

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication58
{
    class Program
    {
        static void Main(string[] args)
        {
            var value = double.Parse(Console.ReadLine());
            var InMetric = Console.ReadLine().ToLower();
            var outMetric = Console.ReadLine().ToLower();
            double result = 0;
            double milimeter = 1000;
            double centimeter = 100;
            double meter=1;
            double kilometer=0.001;
            double feet = 3.2808399;
            double miles=0.000621371192;
            double inches=39.3700787;
            double yards=1.0936133;
            if (InMetric=="km")
            {
                if (outMetric == "mm")
                {
                    result = value * (milimeter / kilometer);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="cm")
                {
                    result = value * (centimeter / kilometer);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="ft")
                {
                    result = value * (feet / kilometer);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="mi")
                {
                    result = value * (miles / kilometer);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="in")
                {
                    result = value * (inches / kilometer);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="yd")
                {
                    result = value * (yards / kilometer);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "km")
                {
                    result = value * (kilometer / kilometer);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "m")
                {
                    result = value * (meter / kilometer);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
            }
            else if (InMetric == "mm")
                {
                   if (outMetric == "km")
                    {
                        result = value * (kilometer / milimeter);
                     Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric == "cm")
                    {
                        result = value * (centimeter / milimeter);
                      Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric == "ft")
                    {
                        result = value * (feet/ milimeter);
                      Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="mi")
                    {
                    result = value * (miles / milimeter);
                   Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="in")
                    {
                    result = value * (inches / milimeter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="yd")
                    {
                    result = value * (yards / milimeter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="mm")
                    {
                    result = value * (milimeter / milimeter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="m")
                    {
                    result = value * (meter / milimeter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                 }
            else if (InMetric == "cm")
                {
                    if (outMetric == "mm")
                   {
                        result = value * (milimeter / centimeter);
                      Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric == "km")
                    {
                       result = value * (kilometer / centimeter);
                      Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric == "ft")
                    {
                        result = value * (feet / centimeter);
                      Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="mi")
                    {
                    result = value * (miles / centimeter);
                    Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="in")
                    {
                    result = value * (inches / centimeter);
                    Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="yd")
                    {
                    result = value * (yards / centimeter);
                     Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="cm")
                    {
                    result = value * (centimeter / centimeter);
                    Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                    else if (outMetric=="m")
                    {
                    result = value * (meter / centimeter);
                     Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                    }
                }
            else if (InMetric == "ft")
            {
                if (outMetric == "mm")
                {
                    result = value * (milimeter / feet);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "cm")
                {
                    result = value * (centimeter / feet);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "km")
                {
                   result = value * (kilometer / feet);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="mi")
                {
                    result = value * (miles / feet);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="in")
                {
                    result = value * (inches / feet);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="yd")
                {
                    result = value * (yards / feet);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="ft")
                {
                  result = value * (feet / feet);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                 else if (outMetric=="m")
                {
                  result = value * (meter / feet);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
            }
          else if (InMetric=="in")
          {
            if (outMetric == "mm")
                {
                    result = value * (milimeter / inches);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "cm")
                {
                    result = value * (centimeter / inches);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "km")
                {
                   result = value * (kilometer / inches);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="mi")
                {
                    result = value * (miles / inches);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="ft")
                {
                    result = value * (feet / inches);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="yd")
                {
                    result = value * (yards / inches);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
               else if (outMetric=="in")
                {
                    result = value * (inches / inches);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="m")
                {
                    result = value * (meter / inches);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
            }

          else if (InMetric=="yd")
          {
            if (outMetric == "mm")
                {
                    result = value * (milimeter / yards);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "cm")
                {
                    result = value * (centimeter / yards);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "km")
                {
                   result = value * (kilometer / yards);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="in")
                {
                    result = value * (inches / yards);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="ft")
                {
                    result = value * (feet / yards);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="mi")
                {
                    result = value * (miles / yards);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
               else if (outMetric=="yd")
                {
                    result = value * (yards / yards);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="m")
                {
                    result = value * (meter / yards);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
            }
          else if (InMetric=="mi")
          {
            if (outMetric == "mm")
                {
                    result = value * (milimeter / miles);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "cm")
                {
                    result = value * (centimeter / miles);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                 else if (outMetric == "km")
                {
                   result = value * (kilometer / miles);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="in")
                {
                    result = value * (inches / miles);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="ft")
                {
                    result = value * (feet / miles);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="yd")
                {
                    result = value * (yards / miles);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="mi")
                {
                    result = value * (miles / miles);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="m")
                {
                    result = value * (meter / miles);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
            }
          else if (InMetric=="m")
          {
            if (outMetric == "mm")
                {
                    result = value * (milimeter / meter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric == "cm")
                {
                    result = value * (centimeter / meter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                 else if (outMetric == "km")
                {
                   result = value * (kilometer / meter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="in")
                {
                    result = value * (inches / meter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="ft")
                {
                    result = value * (feet / meter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="yd")
                {
                    result = value * (yards / meter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="mi")
                {
                    result = value * (miles / meter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
                else if (outMetric=="m")
                {
                    result = value * (meter / meter);
                  Console.WriteLine(Math.Round(result, 4) + " " + outMetric);
                }
            }
        }
    }
}