A cylinder, if its height is truncated by 3 cm, its surface area is reduced by 94.2 cm2. By how many cubic centimeters is the volume of the cylinder reduced?
一个圆柱体，如果把它的高截短3厘米，它的表面积减少94.2平方厘米．这个圆柱体积减少多少立方厘米．
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">94.2 / 6.28 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">94.2 * (5/2)</gadget>
<output>235.5</output>

<result>235.5</result>