20645 ÷ 9 = 2293 R8
Alright, let's work through the division of 20645 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 (0) of the dividend behind the 2 and repeat the process: 20 / 9

Step 2:
9 goes into 20 2 times with a remainder of 2.
Write down 2 as next digit of of the result. 
Result so far: 2
Subtract 18 from 20 to get 2.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 9

Step 3:
9 goes into 26 2 times with a remainder of 8.
Write down 2 as next digit of of the result. 
Result so far: 22
Subtract 18 from 26 to get 8.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 9

Step 4:
9 goes into 84 9 times with a remainder of 3.
Write down 9 as next digit of of the result. 
Result so far: 229
Subtract 81 from 84 to get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 9

Step 5:
9 goes into 35 3 times with a remainder of 8.
Write down 3 as next digit of of the result. 
Result so far: 2293
Subtract 27 from 35 to get 8.

The final result is 2293 with a remainder of 8.