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

namespace SimpleCalculations
{
    class Program
    {
        static void Main(string[] args)
        {
            double USD = double.Parse(Console.ReadLine);
            double BGN = USD / 1.79549;

            Console.WriteLine($"{BGN:F2} BGN");

        }
    }
}