A farm uses 3 tractors to plow land, 3.5 hours a total of 2.52 hectares. On average, how many hectares of land is plowed per tractor per hour?
一个农场用拖拉机耕地，3台3.5小时共耕地2.52公顷．平均每台拖拉机每小时耕地多少公顷？
<gadget id="calculator">2.52 / 3 / 3.5</gadget>
<output>0.24</output>

<result>0.24</result>