The lateral area of a cylinder is 25.12 square centimeters and the radius of the base is 2 centimeters. What is its surface area?
一个圆柱的侧面积是25.12平方厘米，底面半径是2厘米，它的表面积是多少？
<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>