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using System;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {


            double numoChange = double.Parse(Console.ReadLine());
            string unit1 = Console.ReadLine();
            string unit2 = Console.ReadLine();
            double finishUnit = 0;
            if (unit1=="mm"&& unit2=="cm")
            {
                finishUnit = numoChange / 10;
            }
            else if (unit1 == "mm" && unit2 == "m")
            {
                finishUnit = numoChange / 1000;
            }
            else if (unit1 == "m" && unit2 == "mm")
            {
                finishUnit = numoChange * 1000;
            }
            else if (unit1 == "m" && unit2 == "cm")
            {
                finishUnit = numoChange * 100;
            }
            else if (unit1 == "cm" && unit2 == "m")
            {
                finishUnit = numoChange / 100;
            }
            else if (unit1 == "cm" && unit2 == "mm")
            {
                finishUnit = numoChange * 10;
            }
            Console.WriteLine($"{finishUnit:f3}");


        }

    }
}