The lengths of the three sides of a right triangle are 3 cm, 4 cm, and 5 cm. What is the smallest volume in cubic centimeters of a three-dimensional figure obtained by rotating it around one of its right-angled sides as an axis?
一个直角三角形的三条边长分别是3厘米、4厘米、5厘米．沿它的一条直角边为轴旋转一周，所得立体图形的体积最小的是多少立方厘米．
<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 * 4</gadget>
<output>37.68</output>

<result>37.68</result>