Clearly, the largest square is cut out of a piece of rectangular paper with a length of 26 cm and a width of 20 cm. What is the perimeter of this square in cm?
明明在一张长26厘米，宽20厘米的长方形纸里剪了一个最大的正方形，这个正方形的周长是多少厘米？
<gadget id="calculator">20 * 4</gadget>
<output>80</output>

<result>80</result>