If a rectangle with a length of 12 cm is cut off from one end of the largest square, what is the perimeter of the remaining rectangle in cm?
长是12cm的长方形，从一端剪下一个最大的正方形后，剩下长方形的周长是多少cm．
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<result>24</result>