using System;

public class Program

{

    public static void Main()

    {

        Mbox b1 =new Mbox();

        Mbox b2 =new Mbox();

        Mbox b3 =new Mbox();

        b1.setarea(6,7,5);

        b2.setarea(12,13,10);

        b1.Area();

        b2.Area();

        b3=b1+b2;

        b3.Area();

    }

}

public class Mbox

{

    private int lenght,breadth,height;

    private double d=0;

    public void setarea(int i,int j,int p)

    {

        lenght=i;

        breadth=j;

        height=p;

    }

    public void Area()

    {

            d=lenght*breadth*height;

        Console.WriteLine("The Area is "+d);

    }

    public static Mbox operator+ (Mbox a,Mbox b)

    {

        Mbox box =new Mbox();

        box.height= a.height+ b.height;

        box.lenght=a.lenght+b.lenght;

        box.breadth=a.breadth+b.breadth;

        return box;

    }

}