using System;

public class Program

{

    public static void Main()

    {

        //ket qua phep tinh 2 + 15 / 6 * 1 - 7 % 2 - 3 

        Console.Write("ket qua cua phep tinh = " + (2 + 15 / 6 * 1 - 7 % 2 - 3));

    }

}