using System;


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

            double value = double.Parse(Console.ReadLine());
            string inputUnit = Console.ReadLine();
            string convertedUnit = Console.ReadLine();
            double convertedValue = 0;

            if (inputUnit == "mm" && convertedUnit == "m")
            {
                convertedValue = value / 1000;

            }

            else if (inputUnit == "mm" && convertedUnit == "cm")
            {
                convertedValue = value / 10;

            }

            else if (inputUnit == "cm" && convertedUnit == "mm")
                {
                    convertedValue = value * 10;

                }

            else if (inputUnit == "cm" && convertedUnit == "m")
                {
                    convertedValue = value / 100;

                }

            else if (inputUnit == "m" && convertedUnit == "mm")
                {
                    convertedValue = value * 1000;

                }

            else if (inputUnit == "m" && convertedUnit == "cm")
                {
                    convertedValue = value * 100;
                }

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

        }