using System;

public class Program

{

    public static void Main()

    {

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

        double kecove = tax * 0.6;

        double kit = kecove * 0.8;

        double ball = 0.25 * kit;

        double accessories = 0.2 * ball;

        double all = tax + kecove + kit + ball + accessories;

        Console.WriteLine(" Разходите за една година са: {0:F2}", all);

    }

}