using System;

​

public class UserProgramCode

{

    public static double calculateVAT(char ch, double a)

    {

        if (a < 0)

            return -1;

        else

        {

            switch (ch)

            {

                case 'M':

                    a = a * 9 / 100;

                    break;

                case 'V':

                    a = a * 5 / 100;

                    break;

                case 'C':

                    a = a * 12 / 100;

                    break;

                case 'E':

                    a = a * 6.25 / 100;

                    break;

                default:

                    return -1;

            }

        }

​

        return a;

    }

}

​

public class Program : UserProgramCode

{

    public static void Main(string[] args)

    {

        char ch = char.Parse(Console.ReadLine());

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

        double a = calculateVAT(ch, d);

        if (a == -1)

            Console.WriteLine("Invalid Input");

        else

            Console.WriteLine(a);

    }

}