Use 12 small squares with a side length of 1 to build a large rectangle. What is the shortest perimeter of this rectangle?
用12个边长为1的小正方形拼一个大长方形，这个长方形的周长最短是多少？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>