fishTank_SoftUni

using System;

namespace softuni1
{
    class Program
    {
        static void Main(string[] args)
        {
            int lenght = int.Parse(Console.ReadLine());
            int width = int.Parse(Console.ReadLine());
            int height = int.Parse(Console.ReadLine());
            double percent = double.Parse(Console.ReadLine());

            int volume = lenght * width * height;
            double liters = volume * 0.001;
            double p = percent * 0.01;

            double total = liters * (1 - p);
            Console.WriteLine(total);








        }

    }
}