Christmas Preparation

using System;

namespace ChristmasPreparation
{
    class Program
    {
        static void Main(string[] args)
        {
            double paperPrice = double.Parse(Console.ReadLine()) * 5.80;
            double clothPrice = double.Parse(Console.ReadLine()) * 7.20;
            double gluePrice = double.Parse(Console.ReadLine()) * 1.20;
            double discount = (100 - double.Parse(Console.ReadLine())) * 0.01;

            Console.WriteLine($"{(paperPrice + clothPrice + gluePrice) * discount:f3}");
        }
    }
}