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

namespace zadacha12
{
    class Program
    {
        static void Main(string[] args)
        {
            var value = double.Parse(Console.ReadLine());

            var inputCurrency = Console.ReadLine();
            var outputCurrency = Console.ReadLine();

            double result = 0;
            if (inputCurrency == "USD")
            {
                if (outputCurrency == "BGN")
                {
                    result = (value * 1.79549);
                }
                else if (outputCurrency == "EUR")
                {
                    result = (value * 1.79549) / 1.95583;
                }
                else
                {
                    result = (value * 1.79549) / 2.53405;
                }
            }
            else if (inputCurrency == "BGN")
            {
                if (outputCurrency == "EUR")
                {
                    result = value / 1.95583;
                }
                else if (outputCurrency == "GBP")
                {
                    result = value / 2.53405;
                }
                else
                {
                    result = value * 1.79549;
                }
            }
            else if (inputCurrency == "EUR")
            {
                if (outputCurrency == "BGN")
                {
                    result = (value * 1.95583) / 1.0;
                }
                else if (outputCurrency == "GBP")
                {
                    result = (value * 1.95583) / 2.53405;
                }
                else
                {
                    result = (value * 1.95583) / 1.79549;
                }
            }
            else if (inputCurrency == "GBP")
            {
                if (outputCurrency == "BGN")
                {
                    result = value * 2.53405;
                }
                else if (outputCurrency == "USD")
                {
                    result = (value * 2.53405) / 1.79549;
                }
                else
                {
                    result = (value * 2.53405) / 1.95583;
                }
            }

            if (result != 0)
            {
                Console.WriteLine(Math.Round(result, 2));
            }
        }
    }
}