21039028 divided by 869 
Our goal is to divide 21039028 by 869.

Going ahead to step 1:
2 divided by 869 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 869

On to step 2:
21 divided by 869 is 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Fetch the next digit (0) from the dividend, attach it to 21 and continue: 210 / 869

Step 3:
When dividing 210 by 869, we get 0 with a remainder of 210.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 210 after subtracting 0 from 210.
Append the next digit (3) from the dividend to 210 and continue with: 2103 / 869

Moving on to step 4:
869 goes into 2103 2 times with a remainder of 365.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 1738 from 2103 and we're left with 365.
Fetch the next digit (9) from the dividend, attach it to 365 and continue: 3659 / 869

Advancing to step 5:
If we divide 3659 by 869, we get 4 and a remainder of 183.
Put 4 as the next digit of the answer. 
Result so far: 24.0
The remainder is 183 after subtracting 3476 from 3659.
Take the next digit (0) from the dividend and append it to 183, then repeat: 1830 / 869

Advancing to step 6:
869 can be fit into 1830 2 times, resulting in a remainder of 92.
Use 2 as the next digit of our solution. 
Result so far: 242.0
Subtracting 1738 from 1830 leaves us with 92.
Include the next digit (2) from the dividend after 92, then repeat: 922 / 869

Advancing to step 7:
The number 869 fits into 922 1 times, leaving a remainder of 53.
Write down 1 as next digit of the result. 
Result so far: 2421.0
If we take 869 away from 922, we end up with 53.
Take the next digit (8) from the dividend and append it to 53, then repeat: 538 / 869

Going ahead to step 8:
869 can be fit into 538 0 times, resulting in a remainder of 538.
The next digit of our result is 0. 
Result so far: 24210.0
If we take 0 away from 538, we end up with 538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

Step 9:
869 goes into 5380 6 times with a remainder of 166.
Use 6 as the next digit of our solution. 
Result so far: 24210.6
The remainder is 166 after subtracting 5214 from 5380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

On to step 10:
When dividing 1660 by 869, we get 1 with a remainder of 791.
Use 1 as the next digit of our solution. 
Result so far: 24210.61
If we take 869 away from 1660, we end up with 791.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7910, and continue the process.

On to step 11:
869 goes into 7910 9 times with a remainder of 89.
The next digit of our result is 9. 
Result so far: 24210.619
If we take 7821 away from 7910, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 12:
The number 869 fits into 890 1 times, leaving a remainder of 21.
Record the quotient 1 as the next digit in the result. 
Result so far: 24210.6191
The remainder is 21 after subtracting 869 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 13:
210 divided by 869 is 0 with a remainder of 210.
Record the quotient 0 as the next digit in the result. 
Result so far: 24210.6191
Deduct 0 from 210 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 14:
869 can be fit into 2100 2 times, resulting in a remainder of 362.
Use 2 as the next digit of our solution. 
Result so far: 24210.619102
If we subtract 1738 from 2100, we get 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Let's proceed to step 15:
The number 869 fits into 3620 4 times, leaving a remainder of 144.
Use 4 as the next digit of our solution. 
Result so far: 24210.6191024
Subtracting 3476 from 3620 leaves us with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Let's proceed to step 16:
The number 869 fits into 1440 1 times, leaving a remainder of 571.
Record the quotient 1 as the next digit in the result. 
Result so far: 24210.61910241
Deduct 869 from 1440 and we're left with 571.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5710, and continue the process.

In conclusion, the division gives 24210.61910241 with a balance of 5.71e-07.