If three cubes with side lengths of 6 cm are assembled to form a cuboid, what is the reduction in surface area in square centimetres?
用三个棱长为6厘米的正方体拼成一个长方体，表面积减少了多少平方厘米．
<gadget id="calculator">6 * 6 * 4</gadget>
<output>144</output>

<result>144</result>