There is a rectangular piece of paper with a length of 24 cm and a width of 9 cm. If you want to cut it into a square with the same shape as Kugan, what is the maximum length of the side of the square in cm?
有一张长24厘米、宽9厘米的长方形纸，如果要剪成苦干同样在的正方形而没有剩余，正方形的边长最大是多少厘米？
<result>3</result>