Use a piece of rectangular paper with a length of 18.84 cm and a width of 28.26 cm as the side to roll a cylindrical paper tube. There are two rolling methods. Are the volumes of the cylinders obtained by the two rolling methods the same? If not the same size, how much is the difference?
用一张长18.84厘米、宽28.26厘米的长方形纸做侧面卷一个圆柱形状的纸筒，有两种卷法．两种卷法得到的圆柱的体积一样大吗？如果不一样大，又相差多少？
<gadget id="calculator">28.26 / 3.14 / 2</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 ** 2</gadget>
<output>20.25</output>

<gadget id="calculator">3.14 * 20.25 * 18.84</gadget>
<output>1_197.9414</output>

<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 28.26</gadget>
<output>798.6276</output>

<gadget id="calculator">1_197.9414 - 798.6276</gadget>
<output>399.3138</output>

<result>399.3138</result>