After unfolding the sides of a cylinder, a rectangle with a length of 18 cm and a width of 12 cm is obtained. What is the largest possible volume in cubic centimeters of this cylinder? (π takes an approximate value of 3)
把一个圆柱的侧面展开后得到一个长18厘米，宽12厘米的长方形．这个圆柱的体积最大可能是多少立方厘米？(π取近似值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>