How many square decimeters is the surface area reduced by putting together three cubes whose sides are all 6 decimeters long to form a cuboid?
把三个棱长都是6分米的正方体拼成一个长方体，表面积减少了多少平方分米
<gadget id="calculator">6 * 6 * 4</gadget>
<output>144</output>

<result>144</result>