A rectangle with a length of 7 cm and a width of 3 cm is rotated around the width of the rectangle to obtain a three-dimensional figure. What is the volume of this figure?
一个长方形长7厘米，宽3厘米，以长方形的宽为轴旋转一周得到一个立体图形，这个图形的体积是多少？
<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

<gadget id="calculator">3.14 * 49 * 3</gadget>
<output>461.58</output>

<result>461.58</result>