Oh, dude, 81 divided by 6 is like... 13.5. So, if you're looking to share 81 cookies equally among 6 friends, each friend would get 13 cookies and one poor soul would have to settle for half a cookie. Tough break, buddy.
1/81, or about 0.012345679012345679
81
81
116.6173
216
20.25
9
81
81
0.1111
3
81