If a rectangle with a length of 6 cm and a width of 4 cm is rotated once about the axis of length, a cylinder will be obtained. What is its volume in cubic centimeters?
一个长为6厘米，宽为4厘米的长方形，以长为轴旋转一周，将会得到一个圆柱体，它的体积是多少立方厘米．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 6</gadget>
<output>301.44</output>

<result>301.44</result>