A piece of rectangular paper is 8 cm long and 3 cm wide. If it is folded into the largest square, what is the perimeter of the square in cm?
一张长方形纸长8厘米，宽3厘米，用它折成一个最大的正方形，正方形的周长是多少厘米．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>