A parallelogram with a base length of 200 meters and a height of 150 meters covers an area of how many hectares?
一块平行四边形地，底长200米，高150米，占地多少公顷．
<gadget id="calculator">200 * 150</gadget>
<output>30_000</output>

<gadget id="calculator">30_000 / 10_000</gadget>
<output>3</output>

<result>3</result>