04. Metric Converter

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

namespace Metric_Converter
{
    class Program
    {
        static void Main(string[] args)
        {
            double num = double.Parse(Console.ReadLine());
            string inside = Console.ReadLine();
            string outside = Console.ReadLine();

            if (inside == "cm")
            {
                if (outside == "mm")
                {
                    num = num * 10;
                }
                else if (outside == "m")
                {
                    num = num / 100;
                }
            }
            else if (inside == "mm")
            {
                if (outside == "cm")
                {
                    num = num / 10;
                }
                else if (outside == "m")
                {
                    num = num / 1000;
                }
            }
            else if (inside == "m")
            {
                if (outside == "cm")
                { num = num * 100; }
                else if (outside == "mm")
                { num = num * 1000; }
            }
            Console.WriteLine("{0:f3}", num);
        }
    }
}