A piece of parallelogram has an area of 1 hectare, its length is 400 meters, and its height is in meters.
一块平行四边形的地，面积是1公顷，它的长是400米，高多少米．
<gadget id="calculator">10_000 / 400</gadget>
<output>25</output>

<gadget id="calculator">1 * 25</gadget>
<output>25</output>

<result>25</result>