The height of a cylinder is 10cm. If the height is reduced by 2cm, the surface area is reduced by 18.84cm**2. What is the volume of the cylinder in cm**3?
一个圆柱体的高为10cm，如果高减少2cm，则表面积减少18.84cm**2，这个圆柱的体积是多少cm**3？
<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">3.14 * 2.25 * 10</gadget>
<output>70.65</output>

<result>70.65</result>