If a piece of rectangular paper with a length of 15 cm and a width of 8 cm is formed into a cylinder, what is the maximum area of the cylinder in square centimeters? (interface not counted)
把一张长15厘米，宽8厘米的长方形纸围成一个圆筒，这个圆筒的侧面积最多是多少平方厘米．(接口处不计)
<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<result>120</result>