We're dividing 12621740 by 831 
We want to figure out the number of times 12621740 can be divided by 831.

Going ahead to step 1:
The number 831 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 831

Going ahead to step 2:
12 divided by 831 is 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Bring next digit (6) of the dividend behind the 12 and repeat the process: 126 / 831

Going ahead to step 3:
The number 831 fits into 126 0 times, leaving a remainder of 126.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 126 and we're left with 126.
Grab the next digit (2) from the dividend, add it to 126, then carry on: 1262 / 831

Let's proceed to step 4:
If we divide 1262 by 831, we get 1 and a remainder of 431.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 831 from 1262 to get 431.
Append the next digit (1) from the dividend to 431 and continue with: 4311 / 831

Step 5:
831 can be fit into 4311 5 times, resulting in a remainder of 156.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we subtract 4155 from 4311, we get 156.
Include the next digit (7) from the dividend after 156, then repeat: 1567 / 831

Let's proceed to step 6:
The number 831 fits into 1567 1 times, leaving a remainder of 736.
The number 1 becomes the next digit in our result. 
Result so far: 151.0
If we subtract 831 from 1567, we get 736.
Include the next digit (4) from the dividend after 736, then repeat: 7364 / 831

On to step 7:
When dividing 7364 by 831, we get 8 with a remainder of 716.
The next digit of our result is 8. 
Result so far: 1518.0
Deduct 6648 from 7364 and we're left with 716.
Fetch the next digit (0) from the dividend, attach it to 716 and continue: 7160 / 831

Step 8:
831 can be fit into 7160 8 times, resulting in a remainder of 512.
Record the quotient 8 as the next digit in the result. 
Result so far: 15188.0
The remainder is 512 after subtracting 6648 from 7160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Advancing to step 9:
If we divide 5120 by 831, we get 6 and a remainder of 134.
The next digit of our result is 6. 
Result so far: 15188.6
Deduct 4986 from 5120 and we're left with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

On to step 10:
The number 831 fits into 1340 1 times, leaving a remainder of 509.
The next digit of our result is 1. 
Result so far: 15188.61
If we subtract 831 from 1340, we get 509.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

Going ahead to step 11:
The number 831 fits into 5090 6 times, leaving a remainder of 104.
Write down 6 as next digit of the result. 
Result so far: 15188.616
Deduct 4986 from 5090 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Going ahead to step 12:
The number 831 fits into 1040 1 times, leaving a remainder of 209.
Put 1 as the next digit of the answer. 
Result so far: 15188.6161
The remainder is 209 after subtracting 831 from 1040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Step 13:
The number 831 fits into 2090 2 times, leaving a remainder of 428.
Record the quotient 2 as the next digit in the result. 
Result so far: 15188.61612
Deduct 1662 from 2090 and we're left with 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Moving on to step 14:
When dividing 4280 by 831, we get 5 with a remainder of 125.
Record the quotient 5 as the next digit in the result. 
Result so far: 15188.616125
Deduct 4155 from 4280 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Going ahead to step 15:
When dividing 1250 by 831, we get 1 with a remainder of 419.
Use 1 as the next digit of our solution. 
Result so far: 15188.6161251
Subtracting 831 from 1250 leaves us with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

Going ahead to step 16:
The number 831 fits into 4190 5 times, leaving a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 15188.61612515
The remainder is 35 after subtracting 4155 from 4190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

In conclusion, the division gives 15188.61612515 with a balance of 3.5e-08.