A cylinder, if its height is shortened by 6 centimeters, the surface area will be reduced by 75.36 square centimeters, and the volume should be reduced by how many cubic centimeters.
一个圆柱体，如果把它的高截短6厘米，表面积就减少75.36平方厘米，体积应减少多少立方厘米．
<gadget id="calculator">75.36 / 6 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 6</gadget>
<output>75.36</output>

<result>75.36</result>