A rectangle has a length of 4 cm and a width of 2 cm. What is the maximum volume in cubic centimeters of a three-dimensional figure obtained by rotating it around one of its sides.
一个长方形的长是4厘米，宽是2厘米．绕其中一条边旋转一周得到的立体图形的体积最大是多少立方厘米．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 2</gadget>
<output>100.48</output>

<result>100.48</result>