4 tractors plow 7.2 hectares in 3 hours, how many hectares per tractor per hour?
4台拖拉机3小时耕地7.2公顷，平均每台拖拉机每小时耕地多少公顷？
<gadget id="calculator">7.2 / 3 / 4</gadget>
<output>0.6</output>

<result>0.6</result>