oscars ceremony

using System;

namespace exampreparation

{
    class Program
    {
        static void Main(string[] args)
        {
            int rent = int.Parse(Console.ReadLine());

            double statuettes = rent * 0.70;
            double catering = statuettes * 0.85;
            double sounding = catering * 0.5;

            double fullSum = rent + statuettes + catering + sounding;

            Console.WriteLine($"{fullSum:f2}");
        }
    }
}