A cylinder has a base diameter of 8 cm and a height of 12 cm. What is the lateral area of the cylinder in cm**2.
一个圆柱，底面直径8厘米，高12厘米，这个圆柱的侧面积是多少cm**2．
<gadget id="calculator">3.14 * 8 * 12</gadget>
<output>301.44</output>

<result>301.44</result>