A rectangle with a length of 8 cm and a width of 4 cm is rotated around the width of the rectangle to obtain a three-dimensional figure. What is the volume of the three-dimensional figure in cubic centimeters?
一个长方形长8厘米，宽4厘米，以长方形的宽为轴旋转一周得到一个立体图形，这个立体图形的体积是多少立方厘米？
<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64 * 4</gadget>
<output>803.84</output>

<result>803.84</result>