If the sum of the sides of a hexahedron is 36 cm, what is the maximum surface area of the hexahedron?
一个六面体的棱长和为36厘米，这个六面体表面积最大为多少平方厘米．
<gadget id="calculator">3 * 3 * 6</gadget>
<output>54</output>

<result>54</result>