There is a square playground that has a side length of 12 meters. There is a maintenance building on the playground that measures 8 meters by 5 meters. How many square meters of the playground is not covered by the maintenance building? Let's think first. Chain of thought:
12 * 12 = 144 square meters. 8 * 5 = 40 square meters. 144 - 40 = 104 square meters. 104 square meters of the playground are not covered by the maintenance building.
Therefore, the answer is 104.