The length of a rectangular farmland is 500 meters and the width is 20 meters. What is the area in hectares?
一块长方形农田的长是500米，宽是20米，面积是多少公顷．
<gadget id="calculator">500 * 20</gadget>
<output>10_000</output>

<gadget id="calculator">10_000 / 10_000</gadget>
<output>1</output>

<result>1</result>