Roll a rectangle with a length of 31.4 cm and a width of 15 cm into a cylinder. What is the lateral area of the cylinder in centimeters**2.
用长31.4厘米，宽15厘米的长方形卷成一个圆柱形，圆柱形的侧面积是多少厘米**2．
<gadget id="calculator">31.4 * 15</gadget>
<output>471</output>

<result>471</result>