18489 ÷ 8 = 2311 R1
Let's divide 18489 by 8.

Step 1:
8 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 1 to get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 8

Step 2:
8 goes into 18 2 times with a remainder of 2.
Write down 2 as next digit of of the result. 
Result so far: 2
Subtract 16 from 18 to get 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 8

Step 3:
8 goes into 24 3 times with a remainder of 0.
Write down 3 as next digit of of the result. 
Result so far: 23
Subtract 24 from 24 to get 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 8

Step 4:
8 goes into 8 1 times with a remainder of 0.
Write down 1 as next digit of of the result. 
Result so far: 231
Subtract 8 from 8 to get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 8

Step 5:
8 goes into 9 1 times with a remainder of 1.
Write down 1 as next digit of of the result. 
Result so far: 2311
Subtract 8 from 9 to get 1.

The final result is 2311 with a remainder of 1.