using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp23
{
    class Program
    {
        static void Main(string[] args)
        {
            var a = double.Parse(Console.ReadLine());
            var vhod = Console.ReadLine();
            var izhod = Console.ReadLine();
            var USD = 1.79549 ;
            var EUR = 1.95583 ;
            var GBP = 2.53405 ;

            if ((vhod == "BGN") && (izhod == "USD"))
            {
                Console.WriteLine(Math.Round(a / USD, 2));
            }
            else if ((vhod == "BGN") && (izhod == "EUR"))
            {
                Console.WriteLine(Math.Round(a/EUR,2));
            }
            else if ((vhod == "BGN") && (izhod == "GBP"))
            {
                Console.WriteLine(Math.Round(a/GBP,2));
            }
            if ((vhod == "USD") && (izhod == "BGN"))
            {
                Console.WriteLine(Math.Round(a*USD,2));
            }
            else if ((vhod == "USD") && (izhod == "EUR"))
            {
                Console.WriteLine(Math.Round((a * USD) / EUR,2));
            }
            else if ((vhod == "USD") && (izhod == "GBP"))
            {
                Console.WriteLine(Math.Round((a*USD)/GBP,2));
            }
            if ((vhod == "EUR") && (izhod == "BGN"))
            {
                Console.WriteLine(Math.Round(a * EUR,2));
            }
            else if ((vhod == "EUR") && (izhod == "USD"))
            {
                Console.WriteLine(Math.Round((a * EUR) / USD,2));
            }
            else if ((vhod == "EUR") && (izhod == "GBP"))
            {
                Console.WriteLine(Math.Round((a*EUR)/GBP,2));
            }
            if ((vhod == "GBP") && (izhod == "BGN"))
            {
                Console.WriteLine(Math.Round((a * GBP),2));
            }
            else if ((vhod == "GBP") && (izhod == "USD"))
            {
                Console.WriteLine(Math.Round((a * GBP) / USD,2));
            }
            else if ((vhod == "GBP") && (izhod == "EUR"))
            {
                Console.WriteLine(Math.Round((a*GBP)/EUR,2));
            }
        }
    }
}