A rectangular orchard is 500 meters long and 300 meters wide, what is its area in hectares?
一个长方形果园长500米，宽300米，它的面积是多少公顷．
<gadget id="calculator">500 * 300</gadget>
<output>150_000</output>

<gadget id="calculator">150_000 / 10_000</gadget>
<output>15</output>

<result>15</result>