84870 ÷ 9 = 9430 R0
Alright, let's work through the division of 84870 by 9 step by step.

Step 1:
9 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 8 to get 8.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 9

Step 2:
9 goes into 84 9 times with a remainder of 3.
Write down 9 as next digit of of the result. 
Result so far: 9
Subtract 81 from 84 to get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 9

Step 3:
9 goes into 38 4 times with a remainder of 2.
Write down 4 as next digit of of the result. 
Result so far: 94
Subtract 36 from 38 to get 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 9

Step 4:
9 goes into 27 3 times with a remainder of 0.
Write down 3 as next digit of of the result. 
Result so far: 943
Subtract 27 from 27 to get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 9

Step 5:
9 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of of the result. 
Result so far: 9430
Subtract 0 from 0 to get 0.

The final result is 9430 with a remainder of 0.