Dongfang Primary School organized students to plant trees outside the school. 40 students in the fifth grade planted a total of 150 trees, and 45 students in the sixth grade planted 8 trees per person. The average number of trees planted per person in these two grades.
东方小学组织学生到校外植树，五年级40人共植树150棵，六年级45人，每人植树8棵，这两个年级平均每人植树多少棵．
<gadget id="calculator">8 * 45</gadget>
<output>360</output>

<gadget id="calculator">150 + 360</gadget>
<output>510</output>

<gadget id="calculator">40 + 45</gadget>
<output>85</output>

<gadget id="calculator">510 / 85</gadget>
<output>6</output>

<result>6</result>