using System;

namespace CurrencyConverter
{
    class Program
    {
        static void Main(string[] args)
        {
            string BGN = "1",USD = "1.79549", EUR = "1.95583", GBP = "2.53405";
            double a = Double.Parse(BGN);

            double value = Double.Parse(Console.ReadLine());
            string curr1 = Console.ReadLine();
            string curr2 = Console.ReadLine();
            if (curr1 == "BGN")
            {
                curr1 = BGN;
            }
            else if (curr1 == "USD")
            {
                curr1 = USD;
            }
            else if (curr1 == "EUR")
            {
                curr1 = EUR;
            }
            else if (curr1 == "GBP")
            {
                curr1 = GBP;
            }

            if (curr2 == "BGN")
            {

                Console.WriteLine(Math.Round(value * Double.Parse(curr1), 2));
            }
            if (curr2 == "USD")
            {
                Console.WriteLine(Math.Round((value / Double.Parse(USD)) * Double.Parse(curr1), 2));
            }
            if (curr2 == "EUR")
            {
                Console.WriteLine(Math.Round((value / Double.Parse(EUR)) * Double.Parse(curr1), 2));
            }
            if (curr2 == "GBP")
            {
                Console.WriteLine(Math.Round((value / Double.Parse(GBP)) * Double.Parse(curr1), 2));
            }
        }
    }
}