A rectangular woodland is 200 meters long and 100 meters wide, what is its area in hectares
一块长方形林地，长200米，宽100米，它的面积是多少公顷
<gadget id="calculator">200 * 100</gadget>
<output>20_000</output>

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

<result>2</result>