We look at the division of 15851330 by 403 
Our goal is to divide 15851330 by 403.

Going ahead to step 1:
1 divided by 403 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 403

Going ahead to step 2:
403 goes into 15 0 times with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 403

Moving on to step 3:
The number 403 fits into 158 0 times, leaving a remainder of 158.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 158, we end up with 158.
Include the next digit (5) from the dividend after 158, then repeat: 1585 / 403

Step 4:
403 goes into 1585 3 times with a remainder of 376.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 1209 from 1585 and we're left with 376.
Fetch the next digit (1) from the dividend, attach it to 376 and continue: 3761 / 403

Going ahead to step 5:
If we divide 3761 by 403, we get 9 and a remainder of 134.
Use 9 as the next digit of our solution. 
Result so far: 39.0
Subtracting 3627 from 3761 leaves us with 134.
Take the next digit (3) from the dividend and append it to 134, then repeat: 1343 / 403

Let's proceed to step 6:
If we divide 1343 by 403, we get 3 and a remainder of 134.
Use 3 as the next digit of our solution. 
Result so far: 393.0
Deduct 1209 from 1343 and we're left with 134.
Include the next digit (3) from the dividend after 134, then repeat: 1343 / 403

Advancing to step 7:
The number 403 fits into 1343 3 times, leaving a remainder of 134.
Use 3 as the next digit of our solution. 
Result so far: 3933.0
The remainder is 134 after subtracting 1209 from 1343.
Include the next digit (0) from the dividend after 134, then repeat: 1340 / 403

Step 8:
The number 403 fits into 1340 3 times, leaving a remainder of 131.
The number 3 becomes the next digit in our result. 
Result so far: 39333.0
Subtract 1209 from 1340 to get 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Step 9:
If we divide 1310 by 403, we get 3 and a remainder of 101.
Put 3 as the next digit of the answer. 
Result so far: 39333.3
Deduct 1209 from 1310 and we're left with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

On to step 10:
1010 divided by 403 is 2 with a remainder of 204.
Use 2 as the next digit of our solution. 
Result so far: 39333.32
If we take 806 away from 1010, we end up with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Going ahead to step 11:
403 can be fit into 2040 5 times, resulting in a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 39333.325
If we subtract 2015 from 2040, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 12:
403 can be fit into 250 0 times, resulting in a remainder of 250.
The number 0 becomes the next digit in our result. 
Result so far: 39333.325
Deduct 0 from 250 and we're left with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Let's proceed to step 13:
2500 divided by 403 is 6 with a remainder of 82.
Record the quotient 6 as the next digit in the result. 
Result so far: 39333.32506
Deduct 2418 from 2500 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.

On to step 14:
If we divide 820 by 403, we get 2 and a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 39333.325062
If we subtract 806 from 820, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 15:
The number 403 fits into 140 0 times, leaving a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 39333.325062
If we subtract 0 from 140, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 16:
403 can be fit into 1400 3 times, resulting in a remainder of 191.
Put 3 as the next digit of the answer. 
Result so far: 39333.32506203
If we subtract 1209 from 1400, we get 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

In conclusion, the division gives 39333.32506203 with a balance of 1.91e-07.