This is my answer. I have had it built.
The Codes :

using System;

namespace ConsoleApplication1
{
    /// <summary>
    /// Class1 µÄժҪ˵Ã÷¡£
    /// </summary>
    class Class1
    {
        /// <summary>
        /// Ó¦ÓóÌÐòµÄÖ÷Èë¿Úµã¡£
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            int a,b,c,d;
            Console.WriteLine("Pleas input 4 integer numbers ! ");
            a=Convert.ToInt32(Console.ReadLine());
            b=Convert.ToInt32(Console.ReadLine());
            c=Convert.ToInt32(Console.ReadLine());
            d=Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("The product of number {0} and {1} and {2} "+
                "and {3} is {4} ",a,b,c,d,a*b*c*d);
            Console.WriteLine("Press any key to continue...");
            Console.Read();
        }
    }
}

Sorry what is it about?! What question u have answered?!?!

Always:),
Hovik Melkomian.

This is probably the question in Chapter 3 number 5 in the book Beginning Visual C#(I have it) Where the question is:
Write a console application that contains four int values from the user and displays the product.