class Program

    {

        static void Main(string[] args)

        {

            var l = int.Parse(Console.ReadLine());

            var w = int.Parse(Console.ReadLine());

            var h = int.Parse(Console.ReadLine());

            var percent = double.Parse(Console.ReadLine());

​

            var TotalVolume = l * w * h;

            var RealLitres = TotalVolume * 0.001;

            var procent = percent * 0.01;

            Console.WriteLine($"{RealLitres * (1 - procent):f3}");

​

​

        }

    }

​