A cylindrical tea pot with a bottom radius of 4.5 cm and a height of 10 cm. Stick a label paper on its side. What is the minimum size of the label paper in cm**2.
一个圆柱体茶叶罐，底面半径是4.5厘米，高是10厘米，在它的侧面贴上商标纸，商标纸至少是多少厘米**2．
<gadget id="calculator">3.14 * 4.5 * 2 * 10</gadget>
<output>282.6</output>

<result>282.6</result>