MetricUnits

using System;

namespace MetricUnits
{
    class Program
    {
        static void Main(string[] args)
        {
            double value = Double.Parse(Console.ReadLine());
            string input = Console.ReadLine();
            string output = Console.ReadLine();

            double result = 0.0;

            if(input == "mm")
            {
                result = value / 1000;
            }
            else if (input == "cm")
            {
                result = value / 100;
            }else if (input == "m")
            {
                result = value;
            }

            if(output == "mm")
            {
                result *= 1000;
            }
            else if(output == "cm")
            {
                result *= 100;
            }
            Console.WriteLine("{0:F3}", result);
        }
    }
}