20165 ÷ 8 = 2520 R5
We're going to perform division on 20165 with 8 as the divisor.

Step 1:
8 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 2 to get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 8

Step 2:
8 goes into 20 2 times with a remainder of 4.
Write down 2 as next digit of of the result. 
Result so far: 2
Subtract 16 from 20 to get 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 8

Step 3:
8 goes into 41 5 times with a remainder of 1.
Write down 5 as next digit of of the result. 
Result so far: 25
Subtract 40 from 41 to get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 8

Step 4:
8 goes into 16 2 times with a remainder of 0.
Write down 2 as next digit of of the result. 
Result so far: 252
Subtract 16 from 16 to get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 8

Step 5:
8 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of of the result. 
Result so far: 2520
Subtract 0 from 5 to get 5.

The final result is 2520 with a remainder of 5.