Class 1 of five years planted trees, 60 people planted 120 trees in 2 hours, how many trees per hour per person on average?
五年一班同学植树，60人2小时共植树120棵，平均每人每小时植树多少棵？
<gadget id="calculator">120 / 2 / 60</gadget>
<output>1</output>

<result>1</result>