If 12 squares with a side length of 1 cm are assembled to form a rectangle with the largest perimeter, what is its perimeter in centimeters?
用12块边长1厘米的正方形拼成周长最大的长方形，它的周长是多少厘米．
<gadget id="calculator">12 + 1</gadget>
<output>13</output>

<gadget id="calculator">13 * 2</gadget>
<output>26</output>

<result>26</result>