There is a square lotus pond, its circumference is 64 meters, what is its area?
有一个正方形的荷花池，它的周长是64米，则它的面积是多少平方分米？
<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<gadget id="calculator">16 * 16 * 100</gadget>
<output>25_600</output>

<result>25_600</result>