A cube with an edge length of 6 decimeters is surrounded by an iron wire. If this wire is used to form a cuboid with a width and a height of 2 decimeters, what is the length of the cuboid?
用一根铁丝围成一个棱长为6分米的正方体，如果用这根铁丝围成宽和高都是2分米的长方体，这个长方体的长是多少分米？
<gadget id="calculator">6 * 12</gadget>
<output>72</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">72 - 8 - 8</gadget>
<output>56</output>

<gadget id="calculator">56 / 4</gadget>
<output>14</output>

<result>14</result>