On the Arbor Day on March 12, the teacher took the students to plant trees. They were divided into 4 groups with 9 people in each group. The teachers and students planted 360 trees in total. How many trees are planted per person on average?
3月12日植树节，老师带同学们去植树，他们一共分成了4个小组，每个小组9人，师生共植树360棵．平均每人植树多少棵？
<gadget id="calculator">4 * 9</gadget>
<output>36</output>

<gadget id="calculator">360 / 36</gadget>
<output>10</output>

<result>10</result>