A playground is 250 meters long and 200 meters wide, what is its area in hectares?
一个操场长250米，宽200米，它的面积是多少公顷．
<gadget id="calculator">250 * 200</gadget>
<output>50_000</output>

<gadget id="calculator">50_000 / 10_000</gadget>
<output>5</output>

<result>5</result>