The volume of a cylinder is 376.8 cubic decimeters, the radius of the base is 2 decimeters, what is its lateral area?
一个圆柱体的体积是376.8立方分米，底面半径是2分米，它的侧面积是多少．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">376.8 / 12.56</gadget>
<output>30</output>

<gadget id="calculator">2 * 3.14 * 2 * 30</gadget>
<output>376.8</output>

<result>376.8</result>