using System;

​

class Calculation{

    int num1;

    int num2;

​

    public Calculation(int number1, int number2){

        num1 = number1;

        num2 = number2;

    }

    public void introduction(){

        Console.WriteLine(num1 + " + " + num2 + " = " + (num1+num2));

    }

}

public class Program

{

    public static void Main()

    {

        Calculation Group_1 = new Calculation(10, 15);

        Group_1.introduction();

        Calculation Group_2 = new Calculation(30, 20);

        Group_2.introduction();

    }

}