A rectangular cardboard with a length of 12 cm and a width of 6 cm is rotated once along its length to obtain a cylinder. What is the lateral area of this cylinder?
把一个长12厘米，宽6厘米的长方形纸板沿长旋转一周，得到一个圆柱体，这个圆柱体的侧面积是多少？
<gadget id="calculator">3.14 * 6 * 2 * 12</gadget>
<output>452.16</output>

<result>452.16</result>