Suppose that every time a little monkey climbs to the top, a * * * gets 8× 18= 144 peaches.

There are only 53 peaches now, so the remaining 144-53=9 1 peaches have been fined. Compared with climbing to the top, the little monkey loses 8+5= 13 peaches at a time, so * * has 9113 = 7 times.