A rectangle whose length is 10 centimeters and width is 5 centimeters, what is the volume of the cylinder formed by rotating about its width as the axis once?
一个长为10厘米，宽是5厘米的长方形，以它的宽为轴旋转一周所围成的圆柱体的体积是多少立方厘米．
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 5</gadget>
<output>1_570</output>

<result>1_570</result>