Three identical cubes are put together to form a cuboid whose surface area is reduced by 16 square centimeters. What is the surface area of this cuboid?
三个同样的正方体，拼成一个长方体表面积减少16平方厘米，这个长方体的表面积是多少平方厘米．
<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<gadget id="calculator">72 - 16</gadget>
<output>56</output>

<result>56</result>