cuboid carton with a square bottom, unfold its sides, it is exactly a square with a side length of 8 decimeters, how much cardboard is needed to make this carton?
一个底面是正方形的长方体纸盒，将它的侧面展开，正好是一个边长是8分米的正方形，做这个纸盒至少需要多少纸板？
<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 * 2 * 4</gadget>
<output>64</output>

<gadget id="calculator">8 + 64</gadget>
<output>72</output>

<result>72</result>