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 = 
<gadget id="calculator">12*12</gadget>
<output>144</output>
144 square meters
8 * 5 = 
<gadget id="calculator">8*5</gadget>
<output>40</output>
40 square meters
144 - 40 = 
<gadget id="calculator">144-40</gadget>
<output>104</output>
104 square meters
104 square meters of the playground are not covered by the maintenance building.

<result>104</result>