We divide 191928 by 21
Let's see how many times 21 fits into 191928.

Let's proceed to step 1:
When dividing 1 by 21, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 21

Step 2:
The number 21 fits into 19 0 times, leaving a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 19, we get 19.
Fetch the next digit (1) from the dividend, attach it to 19 and continue: 191 / 21

Let's proceed to step 3:
21 goes into 191 9 times with a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 2 after subtracting 189 from 191.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 21

Step 4:
When dividing 29 by 21, we get 1 with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 91.0
Deduct 21 from 29 and we're left with 8.
Bring next digit (2) of the dividend behind the 8 and repeat the process: 82 / 21

On to step 5:
The number 21 fits into 82 3 times, leaving a remainder of 19.
The next digit of our result is 3. 
Result so far: 913.0
If we subtract 63 from 82, we get 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 21

Advancing to step 6:
If we divide 198 by 21, we get 9 and a remainder of 9.
The next digit of our result is 9. 
Result so far: 9139.0
If we subtract 189 from 198, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 9139.4
If we subtract 84 from 90, we 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.

On to step 8:
21 goes into 60 2 times with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 9139.42
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 9:
180 divided by 21 is 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 9139.428
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 10:
If we divide 120 by 21, we get 5 and a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 9139.4285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 11:
150 divided by 21 is 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 9139.42857
If we take 147 away from 150, we end up 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.

Let's proceed to step 12:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 9139.428571
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.

Advancing to step 13:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 9139.4285714
If we subtract 84 from 90, we 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.

Moving on to step 14:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The next digit of our result is 2. 
Result so far: 9139.42857142
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final outcome is 9139.42857142, with a leftover of 1.8e-08.