78809 ÷ 9 = 8756 R5
Alright, let's work through the division of 78809 by 9 step by step.

Step 1:
9 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 7 to get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 9

Step 2:
9 goes into 78 8 times with a remainder of 6.
Write down 8 as next digit of of the result. 
Result so far: 8
Subtract 72 from 78 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 9

Step 3:
9 goes into 68 7 times with a remainder of 5.
Write down 7 as next digit of of the result. 
Result so far: 87
Subtract 63 from 68 to get 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 9

Step 4:
9 goes into 50 5 times with a remainder of 5.
Write down 5 as next digit of of the result. 
Result so far: 875
Subtract 45 from 50 to get 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 9

Step 5:
9 goes into 59 6 times with a remainder of 5.
Write down 6 as next digit of of the result. 
Result so far: 8756
Subtract 54 from 59 to get 5.

The final result is 8756 with a remainder of 5.