When planting trees beside a square pond, one tree should be planted at all four vertices, so that there are 22 trees planted on each side, and how many trees are planted in total around it.
在正方形的池塘边植树，四个顶点都要植一棵，这样每边都种有22棵树，四周共植树多少棵．
<gadget id="calculator">22 * 4</gadget>
<output>88</output>

<gadget id="calculator">88 - 4</gadget>
<output>84</output>

<result>84</result>