They had 28 doughnuts and 7 officers to feed. The cook wanted to give each one 13 doughnuts! To prove he was right he did the problem three different ways. When they did division, they said to do 28 one time. They should have it in 4 times. Next, they did multiplication. They did not put a place holder so they got it wrong. Finally they tried to do addition. They did not carry the 2 when adding the ones column of 13 seven times. Instead they continued to count arriving at 21 + 7 more to get 28. If they wanted to give each officer 13, they would have to bake 91 doughnuts in all. Instead the cook had baked 28 doughnuts. That would be enough to give each officer 4 each.