Currency Converter 2

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

namespace ConsoleApp17
{
    class Program
    {
        static void Main(string[] args)
        {
            double sum = double.Parse(Console.ReadLine());

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

            if (inputCurrency == "USD" || inputCurrency =="usd") sum *= 1.79549;
            else if (inputCurrency == "EUR" || inputCurrency == "eur") sum *= 1.95583;
            else if (inputCurrency == "GBP" || inputCurrency == "gbp") sum *= 2.53405;

            if (outputCurrency == "USD" || outputCurrency == "usd") sum /= 1.79549;
            else if (outputCurrency == "EUR" || outputCurrency == "eur") sum /= 1.95583;
            else if (outputCurrency == "GBP" || outputCurrency == "gbp") sum /= 2.53405;

            Console.WriteLine("{0:F2} {1}",sum,outputCurrency);
        }
    }
}