Use five identical cubes to form a cuboid. The sum of the sides of this cuboid is 168 cm. Find the surface area of this cuboid?
用五个同样的正方体粘接成一个长方体，这个长方体的棱长之和是168厘米，求这个长方体的表面积？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">20 + 4 + 4</gadget>
<output>28</output>

<gadget id="calculator">168 / 28</gadget>
<output>6</output>

<gadget id="calculator">6 * 6 * 2</gadget>
<output>72</output>

<gadget id="calculator">6 * 6 * 5 * 4</gadget>
<output>720</output>

<gadget id="calculator">72 + 720</gadget>
<output>792</output>

<result>792</result>