86853 ÷ 8 = 10856 R5
Alright, let's work through the division of 86853 by 8 step by step.

Step 1:
8 goes into 8 1 times with a remainder of 0.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 8 from 8 to get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 8

Step 2:
8 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of of the result. 
Result so far: 10
Subtract 0 from 6 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 8

Step 3:
8 goes into 68 8 times with a remainder of 4.
Write down 8 as next digit of of the result. 
Result so far: 108
Subtract 64 from 68 to get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 8

Step 4:
8 goes into 45 5 times with a remainder of 5.
Write down 5 as next digit of of the result. 
Result so far: 1085
Subtract 40 from 45 to get 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 8

Step 5:
8 goes into 53 6 times with a remainder of 5.
Write down 6 as next digit of of the result. 
Result so far: 10856
Subtract 48 from 53 to get 5.

The final result is 10856 with a remainder of 5.