using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            double number = double.Parse(Console.ReadLine());
            string IN = Console.ReadLine();
            string OUT = Console.ReadLine();

            if ( IN == "m" )
            {
                if(OUT == "mm")
                {
                    double mToMm = number * 1000;
                    Console.WriteLine($"{mToMm:f3}");
                }



                if (OUT == "cm")
                {
                    double toCm = number * 100;
                    Console.WriteLine($"{toCm:f3}");
                }

            }

            else if (IN == "cm")
            {
                if (OUT == "m")
                {
                    double inCmToM = number / 100;
                    Console.WriteLine($"{inCmToM:f3}");
                }


                if (OUT == "mm")
                {
                    double toMm = number * 10;
                    Console.WriteLine($"{toMm:f3}");
                }
            }

            else if (IN == "mm")
            {
                if (OUT == "cm")
                {
                    double mmToCm = number / 10;
                    Console.WriteLine($"{mmToCm:f3}");
                }


                if(OUT == "m")
                {
                    double toM = number / 1000;
                    Console.WriteLine($"{toM:f3}");
                }
            }

        }
    }
}