The length of a rectangular green space is 2000 meters and the width is 40 meters. How many hectares does it cover?
一个长方形绿地的长是2000米，宽是40米，它的占地面积是多少公顷．
<gadget id="calculator">2_000 * 40</gadget>
<output>80_000</output>

<gadget id="calculator">80_000 / 10_000</gadget>
<output>8</output>

<result>8</result>