4 water pumps irrigate 75.6 hectares of land in 4.5 hours, how many hectares of land is irrigated by each pump per hour on average?
4台抽水机4.5小时浇地75.6公顷，平均每台抽水机每小时浇地多少公顷？
<gadget id="calculator">75.6 / 4.5 / 4</gadget>
<output>4.2</output>

<result>4.2</result>