using System;

class MetricConverter
{
    static void Main(string[] args)
    {
        double distance = double.Parse(Console.ReadLine());
        string inputUnit = Console.ReadLine();
        string outputUnit = Console.ReadLine();

        if(inputUnit == "mm")
        {
            distance /= 1000;
        }
      else  if(inputUnit == "cm")
        {
            distance /= 100;
        }




          if(outputUnit == "mm")
        {
            distance *= 1000;
        }
      else  if(outputUnit == "cm")
        {
            distance *= 100;
        }
        Console.WriteLine($"{distance:F3}");
    }
}