cylinder is 15 centimeters high. If the height is reduced by 3 centimeters, the surface area will be reduced by 37.68 square centimeters. What is the volume of the cylinder?
一个圆柱高15厘米，如果把高减少3厘米，表面积就会减少37.68平方厘米，求这个圆柱体积是多少？
<gadget id="calculator">37.68 / 3 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 15</gadget>
<output>188.4</output>

<result>188.4</result>