Birthday Party

using System;

namespace BirthdayParty
{
    class Program
    {
        static void Main(string[] args)
        {
            double rent = double.Parse(Console.ReadLine()),
                cake = rent / 5,
                drinks = cake * 0.55,
                animator = rent / 3;

            Console.WriteLine(rent + cake + drinks + animator);
        }
    }
}