What is the lateral area of a cylindrical can with a base radius of 4 decimeters and a height of 12 decimeters?
一个圆柱体罐头盒，底面半径是4分米，高是12分米，它的侧面积是多少．
<gadget id="calculator">3.14 * 4 * 2 * 12</gadget>
<output>301.44</output>

<result>301.44</result>