10. The Forest Hotel has 180 rooms, numbered 1, 2, 3, ..., 180. During the Forest Conference, the first batch of arriving animals filled all the rooms with the number 6, the second batch of arriving animals filled all the remaining rooms with the number 8, and the third batch of arriving animals filled all the remaining rooms with the number 9. At this point, the Forest Hotel still has $\qquad$ rooms left.
$97$