The length of a rectangle is 8 cm and the width is 4 cm. If it is rotated around one side, a three-dimensional figure can be obtained. What is the volume of this three-dimensional figure in cubic centimeters?
一个长方形的长是8厘米，宽是4厘米，绕着其中一边旋转一周，可以得到一个立体图形，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</gadget>
<output>200.96</output>

<gadget id="calculator">200.96 * 4</gadget>
<output>803.84</output>

<result>803.84</result>