A cube with sides 2 decimeters has a surface area of 24 square decimeters. If 3 such cubes are used to form a cuboid, what is the surface area of the resulting cuboid?
棱长2分米的正方体，它的表面积是24平方分米．用3个这样的正方体拼成一个长方体，拼成的长方体的表面积是多少平方分米．
<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<gadget id="calculator">2 * 2 * 4</gadget>
<output>16</output>

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

<result>56</result>