We divide 3957301 by 399
We want to divide 3957301 by 399.

Moving on to step 1:
399 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 399

Step 2:
39 divided by 399 is 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Fetch the next digit (5) from the dividend, attach it to 39 and continue: 395 / 399

Advancing to step 3:
399 goes into 395 0 times with a remainder of 395.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 395, we get 395.
Bring next digit (7) of the dividend behind the 395 and repeat the process: 3957 / 399

Moving on to step 4:
When dividing 3957 by 399, we get 9 with a remainder of 366.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 3591 from 3957 leaves us with 366.
Include the next digit (3) from the dividend after 366, then repeat: 3663 / 399

Let's proceed to step 5:
3663 divided by 399 is 9 with a remainder of 72.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
The remainder is 72 after subtracting 3591 from 3663.
Fetch the next digit (0) from the dividend, attach it to 72 and continue: 720 / 399

Going ahead to step 6:
399 goes into 720 1 times with a remainder of 321.
The number 1 becomes the next digit in our result. 
Result so far: 991.0
The remainder is 321 after subtracting 399 from 720.
Grab the next digit (1) from the dividend, add it to 321, then carry on: 3211 / 399

Moving on to step 7:
399 can be fit into 3211 8 times, resulting in a remainder of 19.
Write down 8 as next digit of the result. 
Result so far: 9918.0
Deduct 3192 from 3211 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 8:
If we divide 190 by 399, we get 0 and a remainder of 190.
Record the quotient 0 as the next digit in the result. 
Result so far: 9918.0
If we take 0 away from 190, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Advancing to step 9:
The number 399 fits into 1900 4 times, leaving a remainder of 304.
The number 4 becomes the next digit in our result. 
Result so far: 9918.04
Deduct 1596 from 1900 and we're left with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Moving on to step 10:
The number 399 fits into 3040 7 times, leaving a remainder of 247.
Record the quotient 7 as the next digit in the result. 
Result so far: 9918.047
Subtract 2793 from 3040 to get 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

On to step 11:
The number 399 fits into 2470 6 times, leaving a remainder of 76.
The next digit of our result is 6. 
Result so far: 9918.0476
If we take 2394 away from 2470, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 12:
When dividing 760 by 399, we get 1 with a remainder of 361.
Write down 1 as next digit of the result. 
Result so far: 9918.04761
Subtract 399 from 760 to get 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Going ahead to step 13:
When dividing 3610 by 399, we get 9 with a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 9918.047619
If we take 3591 away from 3610, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 14:
399 goes into 190 0 times with a remainder of 190.
The next digit of our result is 0. 
Result so far: 9918.047619
If we subtract 0 from 190, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 15:
399 can be fit into 1900 4 times, resulting in a remainder of 304.
Use 4 as the next digit of our solution. 
Result so far: 9918.04761904
Subtract 1596 from 1900 to get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

In conclusion, the division gives 9918.04761904 with a balance of 3.04e-07.