using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(" You have to write the tax of the basketball for year");

        double tax = double.Parse(Console.ReadLine());

        double shoes = tax * 0.6;

        double outfit = shoes * 0.8;

        double ball = outfit * 0.25;

        double accessories = ball * 0.2;

        double all = tax + shoes + outfit + ball + accessories;

        Console.WriteLine(all);

    }

}