Use a 216 cm long iron wire to make a frame of a cube, what is the length of the sides of this frame in cm?
用一根长216厘米的铁丝做一个正方体的框架，这个框架的棱长是多少厘米．
<gadget id="calculator">216 / 12</gadget>
<output>18</output>

<result>18</result>