A rectangular lawn is 250 meters long and 80 meters wide, what is the area in hectares?
一块长方形草地长250米，宽80米，面积是多少公顷．
<gadget id="calculator">250 * 80</gadget>
<output>20_000</output>

<gadget id="calculator">20_000 / 10_000</gadget>
<output>2</output>

<result>2</result>