Additional question: A cylinder is 8 cm high, if its height is reduced by 2 cm, the surface area will be reduced by 25.12 cm2. What is the volume of the original cylinder in cubic centimeters?
附加题：一个圆柱高8厘米，如果它的高减少2厘米，表面积就减少25.12平方厘米．原来圆柱的体积是多少立方厘米？
<gadget id="calculator">25.12 / 2</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 8</gadget>
<output>100.48</output>

<result>100.48</result>