When three cubes of 3 decimeters are glued together to form a cuboid, the surface area is reduced by how many square decimeters.
三个棱长为3分米的正方体木块胶合成一个长方体后，表面积减少了多少平方分米．
<gadget id="calculator">3 * 3 * 4</gadget>
<output>36</output>

<result>36</result>