A field of grass is 40 meters long and 25 meters wide. The area of how many such grasslands is about 1 hectare.
一块草地长40米，宽25米．多少块这样的草地面积约为1公顷．
<gadget id="calculator">40 * 25</gadget>
<output>1_000</output>

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

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

<result>10</result>