What is the maximum area of a quadrilateral enclosed by a 36-meter-long wire?
由一根36米长的铁丝围成的四边形的最大面积是多少平方分米．
<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<gadget id="calculator">9 * 9 * 100</gadget>
<output>8_100</output>

<result>8_100</result>