A cylinder with the same radius and height, when the side area is 50.24 square centimeters, find the surface area of the cylinder.
半径和高相等的圆柱体，当侧面积为50.24平方厘米时，求圆柱体的表面积多少．
<gadget id="calculator">3.14 * 8</gadget>
<output>25.12</output>

<gadget id="calculator">25.12 * 2</gadget>
<output>50.24</output>

<gadget id="calculator">50.24 + 50.24</gadget>
<output>100.48</output>

<result>100.48</result>