Multiply together the number of potatoes, the number less one, and twice the
number less one, then divide by 3.
Thus 50, 49, and 99 multiplied together make
242,550, which, divided by 3, gives us 80,850 yards as the correct answer.
boy would thus have to travel 45 miles and fifteen-sixteenths—a nice little
recreation after a day's work.