We look at the division of 21283923 by 891 
We want to figure out the number of times 21283923 can be divided by 891.

Let's proceed to step 1:
891 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 891

On to step 2:
891 goes into 21 0 times with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 891

Advancing to step 3:
The number 891 fits into 212 0 times, leaving a remainder of 212.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 212 after subtracting 0 from 212.
Bring next digit (8) of the dividend behind the 212 and repeat the process: 2128 / 891

Going ahead to step 4:
The number 891 fits into 2128 2 times, leaving a remainder of 346.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 1782 away from 2128, we end up with 346.
Fetch the next digit (3) from the dividend, attach it to 346 and continue: 3463 / 891

Advancing to step 5:
When dividing 3463 by 891, we get 3 with a remainder of 790.
Put 3 as the next digit of the answer. 
Result so far: 23.0
Deduct 2673 from 3463 and we're left with 790.
Append the next digit (9) from the dividend to 790 and continue with: 7909 / 891

Moving on to step 6:
The number 891 fits into 7909 8 times, leaving a remainder of 781.
Put 8 as the next digit of the answer. 
Result so far: 238.0
Subtracting 7128 from 7909 leaves us with 781.
Include the next digit (2) from the dividend after 781, then repeat: 7812 / 891

Step 7:
891 goes into 7812 8 times with a remainder of 684.
Write down 8 as next digit of the result. 
Result so far: 2388.0
The remainder is 684 after subtracting 7128 from 7812.
Grab the next digit (3) from the dividend, add it to 684, then carry on: 6843 / 891

Let's proceed to step 8:
If we divide 6843 by 891, we get 7 and a remainder of 606.
Record the quotient 7 as the next digit in the result. 
Result so far: 23887.0
Deduct 6237 from 6843 and we're left with 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

On to step 9:
6060 divided by 891 is 6 with a remainder of 714.
Use 6 as the next digit of our solution. 
Result so far: 23887.6
Subtract 5346 from 6060 to get 714.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7140, and continue the process.

On to step 10:
891 can be fit into 7140 8 times, resulting in a remainder of 12.
The next digit of our result is 8. 
Result so far: 23887.68
Subtracting 7128 from 7140 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 11:
If we divide 120 by 891, we get 0 and a remainder of 120.
The number 0 becomes the next digit in our result. 
Result so far: 23887.68
If we take 0 away from 120, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 12:
891 goes into 1200 1 times with a remainder of 309.
Record the quotient 1 as the next digit in the result. 
Result so far: 23887.6801
If we take 891 away from 1200, we end up with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Advancing to step 13:
When dividing 3090 by 891, we get 3 with a remainder of 417.
The next digit of our result is 3. 
Result so far: 23887.68013
If we subtract 2673 from 3090, we get 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

Moving on to step 14:
4170 divided by 891 is 4 with a remainder of 606.
Record the quotient 4 as the next digit in the result. 
Result so far: 23887.680134
Deduct 3564 from 4170 and we're left with 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

Advancing to step 15:
When dividing 6060 by 891, we get 6 with a remainder of 714.
Put 6 as the next digit of the answer. 
Result so far: 23887.6801346
The remainder is 714 after subtracting 5346 from 6060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7140, and continue the process.

Going ahead to step 16:
The number 891 fits into 7140 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 23887.68013468
Subtracting 7128 from 7140 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 23887.68013468 and a remainder of 1.2e-08.