Expand the sides of the cylinder to obtain a rectangle with a length of 18 cm and a width of 12 cm. What is the maximum volume of the cylinder? (π takes 3)
把圆柱的侧面展开得到一个长18厘米、宽12厘米的长方形，这个圆柱的最大体积是多少．(π取3)
<gadget id="calculator">18 / 3 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3 * 9 * 12</gadget>
<output>324</output>

<result>324</result>