using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("First Number:");

        int int1 = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Second Number:");

        int int2 = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Third Number:");

        int int3 = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Fourth Number:");

        int int4 = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Product={0}", int1*int2*int3*int4);      

    }

}