using System;

public class Program

{

    public static void Main()

    {

        double number = double.Parse(Console.ReadLine());

        string inputMetric = Console.ReadLine();

        string outputMetric =  Console.ReadLine();

        if ( "mm" == inputMetric)

        {

            number = number / 1000;

        }

        else if ("cm" == inputMetric)

        {

            number = number / 100;

        }

        if ("mm" == outputMetric)

        {

            number = number * 1000;

        }

        else if ("cm" == outputMetric)

        {

            number = number * 100;

        }

        Console.WriteLine("{0:F3}", number);

    }

}