A can is cylindrical. Its bottom surface is 31.4 cm in circumference and 15 cm in height. Label paper is to be pasted around it. What is the area of the label paper in square centimeters?
一种罐头盒是圆柱形，它的底面周长是31.4厘米，高15厘米，要在它的四周贴商标纸，商标纸的面积是多少平方厘米．
<gadget id="calculator">31.4 * 15</gadget>
<output>471</output>

<result>471</result>