using System;

namespace Demo
{
    class Program
    {
        static void Main()
        {
            double num = double.Parse(Console.ReadLine());
            string input = Console.ReadLine();
            string output = Console.ReadLine();

            if (input=="m")
            {
                if (output == "m")
                {
                    Console.WriteLine($"{num:f3}");
                }
                if (output=="mm")
                {
                    Console.WriteLine($"{num*=1000:f3}");
                }
                if (output=="cm")
                {
                    Console.WriteLine($"{num*=100:f3}");
                }
            }
            else if (input=="mm")
            {
                if (output == "m")
                {
                    Console.WriteLine($"{num/=1000}:f3");
                }
                if (output == "mm")
                {
                    Console.WriteLine($"{num}:f3");
                }
                if (output == "cm")
                {
                    Console.WriteLine($"{(num/=1000)*100}:f3");
                }
            }
            else if (input=="cm")
            {
                if (output == "m")
                {
                    Console.WriteLine($"{num /= 1000}:f3");
                }
                if (output == "mm")
                {
                    Console.WriteLine($"{(num/100)*1000}:f3");
                }
                if (output == "cm")
                {
                    Console.WriteLine($"{num}:f3");
                }
            }



        }



    }
}