21023529 divided by 864 
We're looking to find how many times 864 goes into 21023529.

On to step 1:
If we divide 2 by 864, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 864

Moving on to step 2:
The number 864 fits into 21 0 times, leaving a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Fetch the next digit (0) from the dividend, attach it to 21 and continue: 210 / 864

Moving on to step 3:
864 goes into 210 0 times with a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 210 and we're left with 210.
Append the next digit (2) from the dividend to 210 and continue with: 2102 / 864

Advancing to step 4:
The number 864 fits into 2102 2 times, leaving a remainder of 374.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 1728 from 2102, we get 374.
Grab the next digit (3) from the dividend, add it to 374, then carry on: 3743 / 864

Step 5:
When dividing 3743 by 864, we get 4 with a remainder of 287.
The next digit of our result is 4. 
Result so far: 24.0
Subtracting 3456 from 3743 leaves us with 287.
Bring next digit (5) of the dividend behind the 287 and repeat the process: 2875 / 864

Going ahead to step 6:
2875 divided by 864 is 3 with a remainder of 283.
Write down 3 as next digit of the result. 
Result so far: 243.0
Deduct 2592 from 2875 and we're left with 283.
Fetch the next digit (2) from the dividend, attach it to 283 and continue: 2832 / 864

On to step 7:
When dividing 2832 by 864, we get 3 with a remainder of 240.
The next digit of our result is 3. 
Result so far: 2433.0
The remainder is 240 after subtracting 2592 from 2832.
Append the next digit (9) from the dividend to 240 and continue with: 2409 / 864

Advancing to step 8:
864 can be fit into 2409 2 times, resulting in a remainder of 681.
The number 2 becomes the next digit in our result. 
Result so far: 24332.0
If we take 1728 away from 2409, we end up with 681.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6810, and continue the process.

Going ahead to step 9:
The number 864 fits into 6810 7 times, leaving a remainder of 762.
Put 7 as the next digit of the answer. 
Result so far: 24332.7
The remainder is 762 after subtracting 6048 from 6810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7620, and continue the process.

On to step 10:
7620 divided by 864 is 8 with a remainder of 708.
Use 8 as the next digit of our solution. 
Result so far: 24332.78
Deduct 6912 from 7620 and we're left with 708.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7080, and continue the process.

Advancing to step 11:
864 goes into 7080 8 times with a remainder of 168.
Record the quotient 8 as the next digit in the result. 
Result so far: 24332.788
If we subtract 6912 from 7080, we get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

In conclusion, the division gives 24332.788 with a balance of 0.0168.