MetricConverter - Chapter 3.0

//Task 008, Chapter 3.0
using System;

public class MetricConverter
{
    static void Main()
    {
        double size = double.Parse(Console.ReadLine());
        string source = Console.ReadLine().ToLower();
        string dest = Console.ReadLine().ToLower();

        if(source == "mm")
        {
            size /= 1000;
        }
        else if(source == "cm")
        {
            size /= 100;
        }
        else if(source == "mi")
        {
            size /= 0.000621371192;
        }
        else if(source == "in")
        {
            size /= 39.3700787;
        }
        else if(source == "km")
        {
            size /= 0.001;
        }
        else if(source == "ft")
        {
            size /= 3.2808399;
        }
        else if(source == "yd")
        {
            size /= 1.0936133;
        }

        if(dest == "mm")
        {
            size *= 1000;
        }
        else if(dest == "cm")
        {
            size *= 100;
        }
        else if(dest == "mi")
        {
            size *= 0.000621371192;
        }
        else if(dest == "in")
        {
            size *= 39.3700787;
        }
        else if(dest == "km")
        {
            size *= 0.001;
        }
        else if(dest == "ft")
        {
            size *= 3.2808399;
        }
        else if(dest == "yd")
        {
            size *= 1.0936133;
        }

        Console.WriteLine(size + " " + dest);
    }
}