During Arbor Day, the students were divided into 8 groups with 5 people in each group, and a total of 160 trees were planted. How many trees are planted per person on average?
植树节时，同学们被分成了8个小组，每个小组5人，共植树160棵．平均每人植树多少棵？
<gadget id="calculator">160 / 8 / 5</gadget>
<output>4</output>

<result>4</result>