A rectangular piece of paper with a length of 8 cm and a width of 2 cm is rotated around the length as the central axis to form a cylinder. What is the volume of the cylinder in cubic centimeters?
一张长8厘米，宽2厘米的长方形纸片，以长为中心轴旋转形成圆柱，这个圆柱的体积是多少立方厘米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 8</gadget>
<output>100.48</output>

<result>100.48</result>