Put 3 cubes whose edge length is 2dm into a cuboid, what is the surface area of this cuboid in dm**2.
把3个棱长为2dm的正方体拼成一个长方体，这个长方体的表面积是多少dm**2．
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

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

<gadget id="calculator">12 + 12 + 4</gadget>
<output>28</output>

<gadget id="calculator">28 * 2</gadget>
<output>56</output>

<result>56</result>