Plant trees around a square fish pond, one tree is planted at each of the four vertices, and 22 trees are planted on each side. How many trees are planted in total?
在一个正方形鱼塘四周种树，四个顶点都种一棵，每边都种22棵，四周共种树多少棵．
<gadget id="calculator">22 * 4</gadget>
<output>88</output>

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

<result>84</result>