If a right-angled triangle with a base of 4 cm and a height of 3 cm is rotated once along the height, what is the volume of the figure obtained?
将一个底边为4厘米、高为3厘米的直角三角形沿高旋转一周，得到的图形的体积是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 3</gadget>
<output>50.24</output>

<result>50.24</result>