If the side length of a square is 100 meters, what is its area in hectares?
一个正方形的边长是100米，它的面积是多少公顷．
<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>

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

<result>1</result>