Birthday

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Birthday
{
    class Program
    {
        static void Main(string[] args)
        {
            int lengthCM = int.Parse(Console.ReadLine());
            int widthCM = int.Parse(Console.ReadLine());
            int heightCM = int.Parse(Console.ReadLine());
            double percent = double.Parse(Console.ReadLine());

            double liters = lengthCM * widthCM * heightCM;
            liters = Liters * 0.001;
            percent = percent * 0.01;

            double result = Liters * (1 - percent);
            Console.WriteLine($"{result:F3}");
        }
    }
}