A cylindrical can, the diameter of the bottom is 12 cm, the height is 8 cm, label paper is pasted around it, what is the area of the label paper?
一个圆柱形罐头盒，底面直径是12厘米，高是8厘米，在它的周围贴上商标纸，商标纸的面积是多少．
<gadget id="calculator">3.14 * 12 * 8</gadget>
<output>301.44</output>

<result>301.44</result>