A cylinder is formed by a piece of rectangular paper with a length of 15 cm and a width of 12 cm. What is the lateral area of the cylinder in square centimeters?
用一张长15厘米，宽12厘米的长方形纸围成一个圆柱，这个圆柱的侧面积是多少平方厘米．
<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<result>180</result>