Fold a piece of rectangular paper with a length of 12 cm and a width of 8 cm to form the largest square. What is the perimeter of the square in cm?
用一张长12厘米，宽8厘米的长方形纸折成一个最大的正方形，正方形周长是多少厘米．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>