Plant trees around a square site, with 25 trees planted on each side, and one tree is planted at each of the four vertices. How many trees are planted around this site?
在一块正方形场地四周种树，每边都种25棵，并且四个顶点都种有1棵树，问这个场地四周共种树多少棵？
<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<gadget id="calculator">100 - 4</gadget>
<output>96</output>

<result>96</result>