A water pump can irrigate 3.2 hectares at 4 o'clock, how many hours does it take to irrigate 1 hectare on average.
一台抽水机，4时可以浇水3.2公顷，平均浇水1公顷需要多少时．
<gadget id="calculator">4 / 3.2</gadget>
<output>1.25</output>

<result>1.25</result>