For a cylinder with a height of 10 cm, if the height is reduced by 2 cm, the surface area will be reduced by 18.84 cm2 compared to the original one. Find the volume of the new cylinder.
一个高10厘米的圆柱，把高减少2厘米后，表面积比原来减少18.84平方厘米，求新圆柱的体积．
<gadget id="calculator">18.84 / 2</gadget>
<output>9.42</output>

<gadget id="calculator">9.42 / 3.14 / 2</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">10 - 2</gadget>
<output>8</output>

<gadget id="calculator">3.14 * 2.25 * 8</gadget>
<output>56.52</output>

<result>56.52</result>