A cylinder with a height of 8cm, after cutting off a section of cylinder with a height of 2cm, the surface area is reduced by 25.12cm**2, what is the lateral area of the original cylinder?
一个圆柱高8cm，截下2cm高的一段圆柱后，表面积减少25.12cm**2，原来圆柱的侧面积是多少？
<gadget id="calculator">25.12 / 2</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 * 8</gadget>
<output>100.48</output>

<result>100.48</result>