A cuboid whose base is a square can just be equally divided into three identical cubes, and the surface area increases by 120 square centimeters. What is the surface area of this cuboid in square centimetres?
一个底面是正方形的长方体，正好能够平均分成三个完全一样的正方体，这时表面积增加120平方厘米．原来这个长方体的表面积是多少平方厘米？
<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<gadget id="calculator">12 - 4</gadget>
<output>8</output>

<gadget id="calculator">30 * 8</gadget>
<output>240</output>

<result>240</result>