A cuboid firecracker has a length and width of 2.5dm and a height of 2dm. If there is a circle of label paper around it, what is the minimum area of the label paper?
一个长方体的烟花爆竹，长和宽都是2.5dm，高是2dm，如果在四周围上一圈商标纸，这张商标纸的面积至少要多少平方分米？
<gadget id="calculator">2.5 * 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>