Simple mathematics

In a town outside of Neabridge the restaurants were battling for declining custom. Some tried advertising, some tried special offers. As things got worse, many took to attacking their competitors, by badmouthing them, sending threats and attacking delivery drivers. The winner out of the uproar was the supermarket, who were now selling hundreds more microwave meals than previously. Careful investigation discovered that the manager was the root of the problem, by secretly encouraging the restaurants to expand. How did that work, he was asked. He told them: "It's simple mathematics. You have to add take aways to multiply division."