using System;

public class Program

{

//method by value

    int Kali(int bil1, int bil2) {

        int hasil = bil1 * bil2;

        bil1 += 2;

        bil2 *= 2;

        return hasil;

    }

public static void Main(string[] args) {

    int bil1 = 12, bil2 = 14;

    Program objProg = new Program();

    int hasil = objProg.Kali(bil1, bil2);

    Console.WriteLine("Hasil :" + hasil);

    Console.WriteLine("Bilangan 1 :" + bil1);

    Console.WriteLine("Bilangan 2 : " + bil2);

    }

}

​