A cylinder with a height of 9 centimeters is truncated by 3 centimeters, and the surface area is reduced by 37.68 square centimeters. What is the volume of the cylinder?
一个圆柱体高9厘米，截去3厘米，表面积减少37.68平方厘米，求这个圆柱体的体积是多少？
<gadget id="calculator">37.68 / 3</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 9</gadget>
<output>113.04</output>

<result>113.04</result>