To paste a circle of label paper on the side of a cube box with a side length of 8 cm, the area of the label paper should be at least how many square centimeters.
要在一个棱长为8厘米的正方体纸盒的侧面贴上一圈商标纸，商标纸的面积至少应有多少平方厘米．
<gadget id="calculator">8 * 8 * 4</gadget>
<output>256</output>

<result>256</result>