12957729 divided by 397 
We want to figure out the number of times 12957729 can be divided by 397.

On to step 1:
The number 397 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 397

Advancing to step 2:
397 can be fit into 12 0 times, resulting in a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 397

On to step 3:
The number 397 fits into 129 0 times, leaving a remainder of 129.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 129 leaves us with 129.
Bring next digit (5) of the dividend behind the 129 and repeat the process: 1295 / 397

Moving on to step 4:
If we divide 1295 by 397, we get 3 and a remainder of 104.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 1191 from 1295, we get 104.
Fetch the next digit (7) from the dividend, attach it to 104 and continue: 1047 / 397

On to step 5:
397 goes into 1047 2 times with a remainder of 253.
Write down 2 as next digit of the result. 
Result so far: 32.0
The remainder is 253 after subtracting 794 from 1047.
Append the next digit (7) from the dividend to 253 and continue with: 2537 / 397

Moving on to step 6:
The number 397 fits into 2537 6 times, leaving a remainder of 155.
Use 6 as the next digit of our solution. 
Result so far: 326.0
Subtract 2382 from 2537 to get 155.
Bring next digit (2) of the dividend behind the 155 and repeat the process: 1552 / 397

Going ahead to step 7:
397 goes into 1552 3 times with a remainder of 361.
Put 3 as the next digit of the answer. 
Result so far: 3263.0
Subtract 1191 from 1552 to get 361.
Take the next digit (9) from the dividend and append it to 361, then repeat: 3619 / 397

Advancing to step 8:
If we divide 3619 by 397, we get 9 and a remainder of 46.
Record the quotient 9 as the next digit in the result. 
Result so far: 32639.0
Subtract 3573 from 3619 to 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 9:
460 divided by 397 is 1 with a remainder of 63.
Record the quotient 1 as the next digit in the result. 
Result so far: 32639.1
If we subtract 397 from 460, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Going ahead to step 10:
397 can be fit into 630 1 times, resulting in a remainder of 233.
Record the quotient 1 as the next digit in the result. 
Result so far: 32639.11
Deduct 397 from 630 and we're left with 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Our division results in 32639.11 with a remaining 0.233.