There are two layers of slogans at the top of the box.

The key is to look at the size of those nine small boxes with the same size. Are there any specific size requirements? According to the existing box size: 1, the height is 15 cm, the small box has two floors, and the maximum height of a small box is15/2 = 7.5cm.. 2. If you want to put nine small boxes on two floors, then you must put five (at most six) boxes on a single floor. Calculate the size of the small box: the length of the box is 35 cm, and the converted small box length is 35/3= 1 1.6 cm; The width of the box is 25 cm, and the width of the small box is 25/3=8.3 cm. Then, in order to ensure that the pattern is stacked in two layers, there are nine small boxes, the largest size of which is 1 1.6 cm long, 8.3 cm wide and 7.5 cm high.