We look at the division of 15721909 by 828 
We want to divide 15721909 by 828.

Let's proceed to step 1:
1 divided by 828 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 828

Step 2:
828 can be fit into 15 0 times, resulting in a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Bring next digit (7) of the dividend behind the 15 and repeat the process: 157 / 828

Going ahead to step 3:
828 goes into 157 0 times with a remainder of 157.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 157, we get 157.
Bring next digit (2) of the dividend behind the 157 and repeat the process: 1572 / 828

Going ahead to step 4:
828 can be fit into 1572 1 times, resulting in a remainder of 744.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 828 from 1572, we get 744.
Include the next digit (1) from the dividend after 744, then repeat: 7441 / 828

On to step 5:
The number 828 fits into 7441 8 times, leaving a remainder of 817.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
If we subtract 6624 from 7441, we get 817.
Include the next digit (9) from the dividend after 817, then repeat: 8179 / 828

On to step 6:
8179 divided by 828 is 9 with a remainder of 727.
The next digit of our result is 9. 
Result so far: 189.0
The remainder is 727 after subtracting 7452 from 8179.
Fetch the next digit (0) from the dividend, attach it to 727 and continue: 7270 / 828

Step 7:
7270 divided by 828 is 8 with a remainder of 646.
Put 8 as the next digit of the answer. 
Result so far: 1898.0
The remainder is 646 after subtracting 6624 from 7270.
Bring next digit (9) of the dividend behind the 646 and repeat the process: 6469 / 828

Going ahead to step 8:
The number 828 fits into 6469 7 times, leaving a remainder of 673.
Write down 7 as next digit of the result. 
Result so far: 18987.0
Subtracting 5796 from 6469 leaves us with 673.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6730, and continue the process.

On to step 9:
When dividing 6730 by 828, we get 8 with a remainder of 106.
Record the quotient 8 as the next digit in the result. 
Result so far: 18987.8
The remainder is 106 after subtracting 6624 from 6730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Moving on to step 10:
1060 divided by 828 is 1 with a remainder of 232.
Write down 1 as next digit of the result. 
Result so far: 18987.81
If we subtract 828 from 1060, we get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Going ahead to step 11:
When dividing 2320 by 828, we get 2 with a remainder of 664.
The number 2 becomes the next digit in our result. 
Result so far: 18987.812
Deduct 1656 from 2320 and we're left with 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

Moving on to step 12:
When dividing 6640 by 828, we get 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 18987.8128
Deduct 6624 from 6640 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
When dividing 160 by 828, we get 0 with a remainder of 160.
Write down 0 as next digit of the result. 
Result so far: 18987.8128
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 14:
828 goes into 1600 1 times with a remainder of 772.
The number 1 becomes the next digit in our result. 
Result so far: 18987.812801
The remainder is 772 after subtracting 828 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7720, and continue the process.

Advancing to step 15:
828 goes into 7720 9 times with a remainder of 268.
Record the quotient 9 as the next digit in the result. 
Result so far: 18987.8128019
If we take 7452 away from 7720, we end up with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Let's proceed to step 16:
When dividing 2680 by 828, we get 3 with a remainder of 196.
Put 3 as the next digit of the answer. 
Result so far: 18987.81280193
Subtract 2484 from 2680 to get 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

In conclusion, the division gives 18987.81280193 with a balance of 1.96e-07.