cylinder is 10cm high. If its height is cut off by 3cm, its surface area will be reduced by 18.84cm**2. What is the original volume of the cylinder in cubic centimeters?
一个圆柱体高10cm，如果把它的高截去3cm，它的表面积就减少18.84cm**2，这个圆柱体原来的体积是多少立方厘米．
<gadget id="calculator">18.84 / 3 / 3.14 / 2</gadget>
<output>1</output>

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

<gadget id="calculator">3.14 * 1 * 10</gadget>
<output>31.4</output>

<result>31.4</result>