781689 divided by 80 
We're looking to find how many times 80 goes into 781689.

Advancing to step 1:
When dividing 7 by 80, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 80

Step 2:
When dividing 78 by 80, we get 0 with a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Bring next digit (1) of the dividend behind the 78 and repeat the process: 781 / 80

On to step 3:
781 divided by 80 is 9 with a remainder of 61.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 720 from 781 and we're left with 61.
Include the next digit (6) from the dividend after 61, then repeat: 616 / 80

Step 4:
When dividing 616 by 80, we get 7 with a remainder of 56.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
The remainder is 56 after subtracting 560 from 616.
Grab the next digit (8) from the dividend, add it to 56, then carry on: 568 / 80

Moving on to step 5:
80 goes into 568 7 times with a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 977.0
Subtracting 560 from 568 leaves us with 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 80

Step 6:
89 divided by 80 is 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 9771.0
Deduct 80 from 89 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
The number 80 fits into 90 1 times, leaving a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 9771.1
If we subtract 80 from 90, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
The number 80 fits into 100 1 times, leaving a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 9771.11
Deduct 80 from 100 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 9771.11, and the remainder is 0.02.