rectangular nursery covering an area of 5 hectares is 100 meters wide, what is its length in meters?
一个占地5公顷的长方形苗圃，宽是100米，它的长是多少米．
<gadget id="calculator">5 * 10_000</gadget>
<output>50_000</output>

<gadget id="calculator">50_000 / 100</gadget>
<output>500</output>

<result>500</result>