28512 ÷ 9 = 3168 R0
Alright, let's work through the division of 28512 by 9 step by step.

Step 1:
9 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 (8) of the dividend behind the 2 and repeat the process: 28 / 9

Step 2:
9 goes into 28 3 times with a remainder of 1.
Write down 3 as next digit of of the result. 
Result so far: 3
Subtract 27 from 28 to get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 9

Step 3:
9 goes into 15 1 times with a remainder of 6.
Write down 1 as next digit of of the result. 
Result so far: 31
Subtract 9 from 15 to get 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 9

Step 4:
9 goes into 61 6 times with a remainder of 7.
Write down 6 as next digit of of the result. 
Result so far: 316
Subtract 54 from 61 to get 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 9

Step 5:
9 goes into 72 8 times with a remainder of 0.
Write down 8 as next digit of of the result. 
Result so far: 3168
Subtract 72 from 72 to get 0.

The final result is 3168 with a remainder of 0.