Two water pumps can pump 0.4 hectares of water in 4 hours, how many hectares of water can one pump pump per hour?
2台抽水机，4小时可抽水0.4公顷，一台抽水机每小时可抽水多少公顷？
<gadget id="calculator">0.4 / 4 / 2</gadget>
<output>0.05</output>

<result>0.05</result>