// תרגיל 9 //
            Console.WriteLine("Enter how much money you put in the machine:");
            int put = int.Parse(Console.ReadLine());
            int give;
            int give2;
            int left = put % 21;
            if (put < 21)
            {
                give = put / 7;
                Console.WriteLine("Te machine need to give you back {0} cions of seven.", give);
            }
            else if (put > 21)
            {
                give = put / 21;
                Console.WriteLine("The machine need to give you back " + give + " coins of 21.");
                if  (left < 21 && left >= 7)
                {
                    give2 = left / 7;
                    Console.WriteLine("And the machine need to give you back {0} coins of seven.", give2);
                }

            }