The height of a cylinder is 8 cm. If the height is shortened by 3 cm, the surface area will be reduced by 18.84 cm2. Find the volume of the original cylinder.
一个圆柱体高8厘米，如果高缩短3厘米，表面积就减少18.84平方厘米，求原来圆柱体的体积．
<gadget id="calculator">18.84 / 3</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 8</gadget>
<output>25.12</output>

<result>25.12</result>