using System;

public class Program

{

    public static void Main()

    {

        string op;

        double Dolar, Euro, Libra, Resp;

        Console.WriteLine("Dolar");

        Console.WriteLine("Euro");

        Console.WriteLine("Libra");

        op = Console.ReadLine();

        Dolar= Convert.ToDouble(Console.ReadLine());

        Euro= Convert.ToDouble(Console.ReadLine());

        Libra= Convert.ToDouble(Console.ReadLine());

        if (op=="Dolar")

        {

        Resp = Dolar / 5.31;

        Console.WriteLine("Resultado é: " + Resp.ToString());

        }

        else if (op=="Euro")

        {   

        Resp = Euro / 6.49;

        Console.WriteLine("Resultado é: " + Resp.ToString());

        }   

        else if (op=="Libra")

        {

        Resp = Libra / 7.54;

        Console.WriteLine("Resultado é: " + Resp.ToString());

        }

    }

}