891328 ÷ 21 
We want to divide 891328 by 21.

Step 1:
The number 21 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 21

Going ahead to step 2:
89 divided by 21 is 4 with a remainder of 5.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 84 from 89, we get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 21

Let's proceed to step 3:
If we divide 51 by 21, we get 2 and a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 42.0
Subtracting 42 from 51 leaves us with 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 21

Moving on to step 4:
When dividing 93 by 21, we get 4 with a remainder of 9.
Write down 4 as next digit of the result. 
Result so far: 424.0
If we take 84 away from 93, we end up with 9.
Bring next digit (2) of the dividend behind the 9 and repeat the process: 92 / 21

Let's proceed to step 5:
92 divided by 21 is 4 with a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 4244.0
Deduct 84 from 92 and we're left with 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 21

Let's proceed to step 6:
The number 21 fits into 88 4 times, leaving a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 42444.0
The remainder is 4 after subtracting 84 from 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 42444.1
If we take 21 away from 40, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
When dividing 190 by 21, we get 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 42444.19
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 9:
10 divided by 21 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 42444.19
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
21 can be fit into 100 4 times, resulting in a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 42444.1904
Deduct 84 from 100 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.

Step 11:
21 goes into 160 7 times with a remainder of 13.
The next digit of our result is 7. 
Result so far: 42444.19047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 12:
When dividing 130 by 21, we get 6 with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 42444.190476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 13:
The number 21 fits into 40 1 times, leaving a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 42444.1904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 14:
If we divide 190 by 21, we get 9 and a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 42444.19047619
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

In conclusion, the division gives 42444.19047619 with a balance of 1e-09.