A cylindrical tea tube is 16 centimeters in height and 10 centimeters in diameter at the bottom. The businessman plans to wrap a circle of label paper on its side. What is the area of this label paper in square centimeters?
一个圆柱形茶叶筒高为16厘米，底面直径为10厘米，商家准备在它的侧面围上一圈商标纸，这张商标纸的面积是多少平方厘米．
<gadget id="calculator">3.14 * 10 * 16</gadget>
<output>502.4</output>

<result>502.4</result>