There is a cylinder whose base circumference is equal to its height. If the height is shortened by 2 centimeters, its surface area will decrease by 18.84 square centimeters. What is the volume of this cylinder in cubic centimeters?
有一个底面周长和高相等的圆柱体，如果高缩短2厘米，它的表面积就要减少18.84平方厘米，原来这个圆柱体的体积是多少立方厘米？
<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 * 9.42</gadget>
<output>66.5523</output>

<result>66.5523</result>