We look at the division of 781560 by 91 
We want to divide 781560 by 91.

Step 1:
If we divide 7 by 91, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 91

Step 2:
The number 91 fits into 78 0 times, leaving a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Bring next digit (1) of the dividend behind the 78 and repeat the process: 781 / 91

Advancing to step 3:
If we divide 781 by 91, we get 8 and a remainder of 53.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 53 after subtracting 728 from 781.
Include the next digit (5) from the dividend after 53, then repeat: 535 / 91

Going ahead to step 4:
91 can be fit into 535 5 times, resulting in a remainder of 80.
The number 5 becomes the next digit in our result. 
Result so far: 85.0
If we subtract 455 from 535, we get 80.
Append the next digit (6) from the dividend to 80 and continue with: 806 / 91

Let's proceed to step 5:
The number 91 fits into 806 8 times, leaving a remainder of 78.
The number 8 becomes the next digit in our result. 
Result so far: 858.0
The remainder is 78 after subtracting 728 from 806.
Fetch the next digit (0) from the dividend, attach it to 78 and continue: 780 / 91

On to step 6:
780 divided by 91 is 8 with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 8588.0
Deduct 728 from 780 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 7:
91 goes into 520 5 times with a remainder of 65.
Write down 5 as next digit of the result. 
Result so far: 8588.5
If we subtract 455 from 520, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 8:
When dividing 650 by 91, we get 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 8588.57
The remainder is 13 after subtracting 637 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 9:
130 divided by 91 is 1 with a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 8588.571
If we take 91 away from 130, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 10:
If we divide 390 by 91, we get 4 and a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 8588.5714
If we subtract 364 from 390, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 11:
The number 91 fits into 260 2 times, leaving a remainder of 78.
Write down 2 as next digit of the result. 
Result so far: 8588.57142
Deduct 182 from 260 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 12:
The number 91 fits into 780 8 times, leaving a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 8588.571428
The remainder is 52 after subtracting 728 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 13:
91 goes into 520 5 times with a remainder of 65.
Use 5 as the next digit of our solution. 
Result so far: 8588.5714285
The remainder is 65 after subtracting 455 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 14:
650 divided by 91 is 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 8588.57142857
Subtract 637 from 650 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 8588.57142857 with a remainder of 1.3e-08.