A 168 cm long iron wire encloses a cuboid or cube, and design it. How can the volume of the encircled shape be the largest? What is the length, width and height?
把一根长168厘米的铁丝围一个长方体或正方体，设计一下，怎样围的形状体积最大？长、宽、高各是多少？
<gadget id="calculator">168 / 12</gadget>
<output>14</output>

<result>14</result>