If 12 square tables with a side length of 1 meter are assembled into a rectangle, how can the perimeter of the formed figure be the shortest? What is the circumference in meters at this time?
把12张边长1米的正方形桌子拼成长方形，怎样拼才能使拼成的图形周长最短？此时的周长是多少米？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

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

<result>14</result>