The length of a rectangle is 5cm and the width is 3cm. What is the volume of the three-dimensional figure obtained by rotating it around the 5cm side as the axis.
一个长方形的长是5cm，宽是3cm，以5厘米的边为轴旋转一周，得到立体图形的体积是多少．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 5</gadget>
<output>141.3</output>

<result>141.3</result>