If a rectangle is 8 cm long and 3 cm wide, what is the volume in cubic centimeters obtained by rotating it around the length axis once?
一个长方形，长8厘米，宽3厘米，以长为轴旋转一周所得图形的体积是多少立方厘米．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 8</gadget>
<output>226.08</output>

<result>226.08</result>