using System;

class OverloadOp

{

    public int nr = 0;

    public OverloadOp() { }

    public OverloadOp(int n)

    {

        nr = n;

    }

    public static OverloadOp operator *(OverloadOp Comp1, OverloadOp Comp2)

                         => new OverloadOp(Comp2.nr * Comp1.nr);

​

    public void display()

    {

        Console.WriteLine(nr);

    }

}

​

class CalculateNumber

{

    static void Main(string[] args)

    {

        OverloadOp num1 = new OverloadOp(10);

        OverloadOp num2 = new OverloadOp(20);

        OverloadOp num3 = new OverloadOp();

        num3 = num1 * num2;

        num1.display(); // 10

        num2.display(); // 20

        num3.display(); // 200

    }

}