using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Length = ");

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

        Console.Write("Weigth = ");

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

        Console.Write("Heigth = ");

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

        var obem = height * weigth * length;

        Console.Write("V = {0}", obem / 3);

    }

}