We're dividing 29857986 by 831 
We want to divide 29857986 by 831.

On to step 1:
831 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 831

Step 2:
831 goes into 29 0 times with a remainder of 29.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 29 after subtracting 0 from 29.
Append the next digit (8) from the dividend to 29 and continue with: 298 / 831

Advancing to step 3:
If we divide 298 by 831, we get 0 and a remainder of 298.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 298 to get 298.
Bring next digit (5) of the dividend behind the 298 and repeat the process: 2985 / 831

Moving on to step 4:
The number 831 fits into 2985 3 times, leaving a remainder of 492.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 2493 away from 2985, we end up with 492.
Include the next digit (7) from the dividend after 492, then repeat: 4927 / 831

Step 5:
831 goes into 4927 5 times with a remainder of 772.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
Subtracting 4155 from 4927 leaves us with 772.
Bring next digit (9) of the dividend behind the 772 and repeat the process: 7729 / 831

Moving on to step 6:
831 can be fit into 7729 9 times, resulting in a remainder of 250.
Put 9 as the next digit of the answer. 
Result so far: 359.0
If we subtract 7479 from 7729, we get 250.
Bring next digit (8) of the dividend behind the 250 and repeat the process: 2508 / 831

On to step 7:
The number 831 fits into 2508 3 times, leaving a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 3593.0
Deduct 2493 from 2508 and we're left with 15.
Fetch the next digit (6) from the dividend, attach it to 15 and continue: 156 / 831

Let's proceed to step 8:
156 divided by 831 is 0 with a remainder of 156.
Write down 0 as next digit of the result. 
Result so far: 35930.0
Subtract 0 from 156 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Step 9:
The number 831 fits into 1560 1 times, leaving a remainder of 729.
Put 1 as the next digit of the answer. 
Result so far: 35930.1
Subtracting 831 from 1560 leaves us with 729.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7290, and continue the process.

Let's proceed to step 10:
831 can be fit into 7290 8 times, resulting in a remainder of 642.
Record the quotient 8 as the next digit in the result. 
Result so far: 35930.18
If we subtract 6648 from 7290, we get 642.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6420, and continue the process.

Going ahead to step 11:
When dividing 6420 by 831, we get 7 with a remainder of 603.
Put 7 as the next digit of the answer. 
Result so far: 35930.187
If we subtract 5817 from 6420, we get 603.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6030, and continue the process.

Advancing to step 12:
6030 divided by 831 is 7 with a remainder of 213.
The next digit of our result is 7. 
Result so far: 35930.1877
If we subtract 5817 from 6030, we get 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

The final result is 35930.1877 with a remainder of 0.00213.