We look at the division of 857040 by 86 
Our goal is to divide 857040 by 86.

Step 1:
8 divided by 86 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 86

Advancing to step 2:
86 goes into 85 0 times with a remainder of 85.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 85 to get 85.
Grab the next digit (7) from the dividend, add it to 85, then carry on: 857 / 86

Let's proceed to step 3:
If we divide 857 by 86, we get 9 and a remainder of 83.
The next digit of our result is 9. 
Result so far: 9.0
If we take 774 away from 857, we end up with 83.
Append the next digit (0) from the dividend to 83 and continue with: 830 / 86

On to step 4:
When dividing 830 by 86, we get 9 with a remainder of 56.
The next digit of our result is 9. 
Result so far: 99.0
The remainder is 56 after subtracting 774 from 830.
Grab the next digit (4) from the dividend, add it to 56, then carry on: 564 / 86

Advancing to step 5:
564 divided by 86 is 6 with a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 996.0
Subtract 516 from 564 to get 48.
Take the next digit (0) from the dividend and append it to 48, then repeat: 480 / 86

Let's proceed to step 6:
If we divide 480 by 86, we get 5 and a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 9965.0
The remainder is 50 after subtracting 430 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 7:
500 divided by 86 is 5 with a remainder of 70.
The next digit of our result is 5. 
Result so far: 9965.5
Subtracting 430 from 500 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 8:
The number 86 fits into 700 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 9965.58
The remainder is 12 after subtracting 688 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
The number 86 fits into 120 1 times, leaving a remainder of 34.
The number 1 becomes the next digit in our result. 
Result so far: 9965.581
Subtracting 86 from 120 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
86 can be fit into 340 3 times, resulting in a remainder of 82.
Put 3 as the next digit of the answer. 
Result so far: 9965.5813
Deduct 258 from 340 and we're left with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 11:
86 can be fit into 820 9 times, resulting in a remainder of 46.
The next digit of our result is 9. 
Result so far: 9965.58139
If we subtract 774 from 820, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 12:
If we divide 460 by 86, we get 5 and a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 9965.581395
If we take 430 away from 460, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 13:
If we divide 300 by 86, we get 3 and a remainder of 42.
Write down 3 as next digit of the result. 
Result so far: 9965.5813953
Subtract 258 from 300 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 14:
420 divided by 86 is 4 with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 9965.58139534
Subtract 344 from 420 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final outcome is 9965.58139534, with a leftover of 7.6e-08.