using System;

public class Program

{

    public static void Main()

    {

        int a=10;

        int b=20;

        int sum=0;

        int p=0;

        int s=0;

        sum=Caluculate(a,b,out p,out s);

        Console.WriteLine("Addition "+sum);

        Console.WriteLine("multiplication "+p);

        Console.WriteLine("subtraction "+s);

    }

    public static int Caluculate(int a, int b,out int p,out int s)

    {

        int sum=0;

        sum=a+b;

        p=a*b;

        s=a-b;

        return sum;

    }

}