The side length of a square vegetable field is 20 meters, how many such large square vegetable fields have an area of 1 hectare.
一块正方形菜地边长是20米，多少块这么大的正方形菜地面积是1公顷．
<gadget id="calculator">20 * 20</gadget>
<output>400</output>

<gadget id="calculator">10_000 / 400</gadget>
<output>25</output>

<gadget id="calculator">1 * 25</gadget>
<output>25</output>

<result>25</result>