Use a piece of rectangular paper with a length of 15cm and a width of 6cm to form a cylinder. What is the lateral area of the cylinder in cm**2.
用一张长15cm、宽6cm的长方形纸围成一个圆柱，这个圆柱的侧面积是多少cm**2．
<gadget id="calculator">15 * 6</gadget>
<output>90</output>

<result>90</result>