There is a plastic rod, which can just be made into a cuboid model with a length of 8 cm, a width of 6 cm, and a height of 4 cm. If this plastic rod is used to make a cube model, what is the longest side length of the cube model in centimeters?
有一根塑料棒，正好可以做成一个长8cm、宽6cm、高4cm的长方体模型．如果用这根塑料棒做一个正方体模型，这个正方体模型的棱长最长可以是多少厘米？
<gadget id="calculator">8 + 6 + 4</gadget>
<output>18</output>

<gadget id="calculator">4 / 12</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18 * (1/3)</gadget>
<output>6</output>

<result>6</result>