Let Lao Liu do it for 8 days first, and Xiao Li will do the rest alone. Xiao Li needs 14 days, which is equivalent to Lao Liu and Xiao Li working together for 8 days and Xiao Li working alone again.

14-8 = 6 (days)

Lao Liu and Xiao Li worked together for 8 days before finishing the work.

12 points 1× 8 = 2/3.

It only took Xiao Li six days to finish the work.

0-2 of 65438+3 = 3 1

Xiao Li finished the work alone.

6/3 1 = 18 (days)

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