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?
12 * 12 = <<12*12=144>>144 square meters
8 * 5 = <<8*5=40>>40 square meters
144 - 40 = <<144-40=104>>104 square meters
104 square meters of the playground are not covered by the maintenance building.
#### 104