using System;
using SaltCityTech.Calculator;

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("2 + 2 = {0}", Calculator.Add(2, 2));
        Console.WriteLine("2 - 1 = {0}", Calculator.Subtract(2, 1));
        Console.WriteLine("2 * 3 = {0}", Calculator.Multiply(2, 3));
        Console.WriteLine("4 / 2 = {0}", Calculator.Divide(4, 2));
    }
}
