using System;

 public class Program

{

   public  static void Main(string[] args)

    {

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

        var first = Console.ReadLine().ToLower();

        var second = Console.ReadLine().ToLower();

        if (first == "usd")

        {

            if (second == "bgn")

            {

                Console.WriteLine("{0}", Math.Round(num * 1.79549, 2));

            }

            else if (second == "eur")

            {

                Console.WriteLine("{0}", Math.Round(num * 0.91801, 2));

            }

            else if (second == "gbp")

            {

                Console.WriteLine("{0}", Math.Round(num * 0.70854, 2));

            }

        }

        if (first == "bgn")

        {

            if (second == "usd")

            {

                Console.WriteLine("{0}", Math.Round(num / 1.79549, 2));

            }

            else if (second == "eur")

            {

                Console.WriteLine("{0}", Math.Round(num / 1.95583, 2));

            }

            else if (second == "gbp")

            {

                Console.WriteLine("{0}", Math.Round(num / 2.53405, 2));

            }

        }

        if (first == "eur")

        {

            if (second == "bgn")

            {

                Console.WriteLine("{0}", Math.Round(num * 2.53405, 2));

            }

            else if (second == "usd")

            {

                Console.WriteLine("{0}", Math.Round(num * 1.08930, 2));

            }

            else if (second == "gbp")

            {

                Console.WriteLine("{0}", Math.Round(num * 0.77181, 2));

            }

        }

        if (first == "gbp")

            if (second == "bgn")

            {

                Console.WriteLine("{0}", Math.Round(num * 0.39462, 2));

            }

            else if (second == "usd")

            {

                Console.WriteLine("{0}", Math.Round(num * 2.53405 / 1.79549, 2));

            }

            else if (second == "eur")

            {

                Console.WriteLine("{0}", Math.Round(num * 0.77181, 2));

            }

    }

}