The area of a piece of land is about 500 square meters, how many pieces of such land, the area is about 1 hectare.
一块土地面积约是500平方米，多少块这样的土地，面积约1公顷．
<gadget id="calculator">10_000 / 500</gadget>
<output>20</output>

<gadget id="calculator">1 * 20</gadget>
<output>20</output>

<result>20</result>