A piece of white paper with a side length of 5.5 cm is surrounded to form a cylindrical paper tube. What is the side area of the paper tube in square decimeters?
把一张边长为5.5厘米的正方形白纸，围成一个圆柱形纸筒，这个纸筒的侧面积是多少平方分米．
<gadget id="calculator">5.5 * 5.5</gadget>
<output>30.25</output>

<gadget id="calculator">30.25 / 100</gadget>
<output>0.3025</output>

<result>0.3025</result>