The school organizes 6 tree planting groups, each group has 18 people, and a total of 540 trees are planted. How many trees are planted by each person on average?
学校组织6个植树小组，每组有18人，共植树540棵，平均每人植树多少棵？
<gadget id="calculator">18 * 6</gadget>
<output>108</output>

<gadget id="calculator">540 / 108</gadget>
<output>5</output>

<result>5</result>