using System;

namespace seconds_cald
{
    class Program
    {
        static void Main(string[] args)
        {

            double num = double.Parse(Console.ReadLine());
            string from = Console.ReadLine();
            string to = Console.ReadLine();

            double result = 0.0;

            if (from == "mm" && to == "cm")

            {
                result = num / 10;
            }

            else if (from == "mm" && to == "m")

            {
                result = num / 1000;
            }

            else if (from == "cm" && to == "mm")

            {
                result = num * 10;
            }

            else if (from == "m" && to == "cm")

            {
                result = num * 100;
            }

            else if (from == "cm" && to == "m")

            {
                result = num / 100;
            }

            else if (from == "m" && to == "mm")

            {
                result = num * 1000;
            }

            Console.WriteLine($"{result:F3}");

        }
    }
}