Using a piece of rectangular paper with a length of 20 cm and a width of 14 cm, cut out the largest square, what is the perimeter of this square in cm?
用一张长20厘米，宽14厘米的长方形的纸，剪一个最大的正方形，这个正方形的周长是多少厘米？
<gadget id="calculator">14 * 4</gadget>
<output>56</output>

<result>56</result>