The base area of a cylinder is 12.56 square centimeters and the height is 2 centimeters. What is its lateral area?
圆柱体的底面积是12.56平方厘米，高2厘米，它的侧面积是多少．
<gadget id="calculator">3.14 * 2 * 2 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">25.12 + 25.12</gadget>
<output>50.24</output>

<result>50.24</result>