Basketball Equipment

using System;

namespace BasketballEquipment
{
    class Program
    {
        static void Main(string[] args)
        {
            int fee = int.Parse(Console.ReadLine());
            double shues = fee * 0.6;
            double dress = shues * 0.8;
            double ball = dress / 4;
            double accessories = ball / 5;

            Console.WriteLine($"{fee + shues + dress + ball + accessories:F2}");
        }
    }
}