A square is 500 meters long and 60 meters wide, what is the area in hectares
一个广场长500米，宽60米，占地面积是多少公顷
<gadget id="calculator">500 * 60</gadget>
<output>30_000</output>

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

<result>3</result>