A can has a bottom diameter of 6 cm and a height of 12 cm. What is the area of the label paper to stick label paper on all its sides?
一个易拉罐，它的底面直径是6cm，高是12cm．要在它的侧面全部贴上商标纸，商标纸的面积应是多少？
<gadget id="calculator">3.14 * 6 * 12</gadget>
<output>226.08</output>

<result>226.08</result>