A cube can with a side length of 8.5 cm, and label paper is pasted around the box. How many square decimeters should the area of this label paper be at least?
一个棱长8.5厘米的正方体罐头盒，在盒的四周贴上商标纸．这张商标纸的面积至少应有多少平方分米？
<gadget id="calculator">8.5 / 10</gadget>
<output>0.85</output>

<gadget id="calculator">0.85 * 0.85 * 4</gadget>
<output>2.89</output>

<result>2.89</result>