The garden workers are divided into 5 groups, each group has 9 people, to complete the tree planting task of 990 saplings, how many trees are planted by each person on average?
园林工人分成5个小组，每个小组有9人，要完成990棵树苗的植树任务，平均每人植多少棵？
<gadget id="calculator">5 * 9</gadget>
<output>45</output>

<gadget id="calculator">990 / 45</gadget>
<output>22</output>

<result>22</result>