Based on what I saw, Billy was right because ma didn’t included the zero for the tens place. Instead she and pa added all of the numbers (not including the different places together) for five fourteens. The guy in the other video who thought that seven goes into twenty-eight thirteen times did the math wrong. He put seven in eight once so he put it aside (one) and subtract twenty-eight to seven to make it twenty-one. Seven goes into twenty-one three times and put the three next to the one instead of adding the two together.