Let's divide 886728 by 21
We want to divide 886728 by 21.

Advancing to step 1:
When dividing 8 by 21, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 21

Going ahead to step 2:
21 can be fit into 88 4 times, resulting in a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 4 after subtracting 84 from 88.
Bring next digit (6) of the dividend behind the 4 and repeat the process: 46 / 21

On to step 3:
If we divide 46 by 21, we get 2 and a remainder of 4.
The next digit of our result is 2. 
Result so far: 42.0
The remainder is 4 after subtracting 42 from 46.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 21

On to step 4:
The number 21 fits into 47 2 times, leaving a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 422.0
If we subtract 42 from 47, we get 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 21

Moving on to step 5:
21 can be fit into 52 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 4222.0
If we subtract 42 from 52, we get 10.
Bring next digit (8) of the dividend behind the 10 and repeat the process: 108 / 21

Advancing to step 6:
The number 21 fits into 108 5 times, leaving a remainder of 3.
The next digit of our result is 5. 
Result so far: 42225.0
Deduct 105 from 108 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 42225.1
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 8:
If we divide 90 by 21, we get 4 and a remainder of 6.
The next digit of our result is 4. 
Result so far: 42225.14
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
When dividing 60 by 21, we get 2 with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 42225.142
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
When dividing 180 by 21, we get 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 42225.1428
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 11:
When dividing 120 by 21, we get 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 42225.14285
Subtracting 105 from 120 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 12:
When dividing 150 by 21, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 42225.142857
Subtract 147 from 150 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 13:
If we divide 30 by 21, we get 1 and a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 42225.1428571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 14:
21 goes into 90 4 times with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 42225.14285714
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final outcome is 42225.14285714, with a leftover of 6e-09.