If a tractor plows (2/5) hectares per hour, how many hours does it take to plow 2 hectares?
一台拖拉机每小时耕地(2/5)公顷，要耕完2公顷地需要多少小时．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 / (2/5)</gadget>
<output>5</output>

<result>5</result>