Crushed Apples and a Balance Scale

You are preparing for meals ahead of your busy night at Restaurant Deep Dishes. An essential ingredient is apples. In your inventory, you have $M$ kilograms of crushed apples. Head Chef Sandeep needs exactly $N$ kilograms of crushed apples, but Chef Pal has lost the weighing machine. Instead, all that is left is a balance pan with two scales. You do not have any measuring weights with you either