Trees are planted around a square site, and one tree is planted at each of the four vertices, so that 24 trees are planted on each side, and how many trees are planted in total.
在一个正方形场地四周种树，四个顶点都种1棵树，这样每边都种24棵，四周共种树多少棵．
<gadget id="calculator">24 * 4</gadget>
<output>96</output>

<gadget id="calculator">96 - 4</gadget>
<output>92</output>

<result>92</result>