A cylinder is formed by a piece of rectangular paper with a length of 12 cm and a width of 10 cm. What is the lateral area of the cylinder in square centimeters?
用一张长12cm、宽10cm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">12 * 10</gadget>
<output>120</output>

<result>120</result>