What is the volume in cubic centimeters of a three-dimensional figure obtained by rotating one side of a triangular plate with two sides of 3 cm as the axis?
以两条直角边都是3厘米的三角板的一条直角边为轴旋转一周，得到的立体图形的体积是多少立方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 3</gadget>
<output>28.26</output>

<result>28.26</result>