921902 divided by 21 
We want to figure out the number of times 921902 can be divided by 21.

Going ahead to step 1:
21 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (2) from the dividend, attach it to 9 and continue: 92 / 21

Moving on to step 2:
When dividing 92 by 21, we get 4 with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 84 from 92 leaves us with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 21

Let's proceed to step 3:
21 goes into 81 3 times with a remainder of 18.
Write down 3 as next digit of the result. 
Result so far: 43.0
Subtracting 63 from 81 leaves us with 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 21

Moving on to step 4:
When dividing 189 by 21, we get 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 439.0
Deduct 189 from 189 and we're left with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 21

Advancing to step 5:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 4390.0
Subtracting 0 from 0 leaves us with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 21

Advancing to step 6:
21 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 43900.0
If we take 0 away from 2, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
21 goes into 20 0 times with a remainder of 20.
The next digit of our result is 0. 
Result so far: 43900.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
The number 21 fits into 200 9 times, leaving a remainder of 11.
The next digit of our result is 9. 
Result so far: 43900.09
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 9:
When dividing 110 by 21, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 43900.095
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 10:
When dividing 50 by 21, we get 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 43900.0952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 11:
21 can be fit into 80 3 times, resulting in a remainder of 17.
The next digit of our result is 3. 
Result so far: 43900.09523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 12:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 43900.095238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 13:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 43900.095238
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 14:
The number 21 fits into 200 9 times, leaving a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 43900.09523809
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

After the division, we end up with 43900.09523809 and a remainder of 1.1e-08.