There is a rectangular cardboard with a length of 24 cm and a width of 18 cm. Xiao Ming is rolled into a cylinder horizontally, and Xiao Hua is also rolled into a cylinder vertically. Which cylinder is larger? How big is it? (Pi is taken as 3)
有一块长24厘米、宽18厘米的长方形硬纸板，小明横着卷成一个圆柱，小华竖着也卷成一个圆柱，哪个圆柱体体积大？大多少？(圆周率取3)
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3 * 16 * 18</gadget>
<output>864</output>

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

<gadget id="calculator">3 * 9 * 24</gadget>
<output>648</output>

<gadget id="calculator">864 - 648</gadget>
<output>216</output>

<result>216</result>