Let's divide 908073 by 21
We're looking to find how many times 21 goes into 908073.

Advancing to step 1:
The number 21 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 21

Step 2:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 6 after subtracting 84 from 90.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 21

Step 3:
21 goes into 68 3 times with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 43.0
If we take 63 away from 68, we end up with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 21

Let's proceed to step 4:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 432.0
Subtract 42 from 50 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 21

Advancing to step 5:
When dividing 87 by 21, we get 4 with a remainder of 3.
The next digit of our result is 4. 
Result so far: 4324.0
If we subtract 84 from 87, we get 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 21

Let's proceed to step 6:
If we divide 33 by 21, we get 1 and a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 43241.0
The remainder is 12 after subtracting 21 from 33.
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 7:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 43241.5
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.

Going ahead to step 8:
If we divide 150 by 21, we get 7 and a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 43241.57
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 9:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 43241.571
If we subtract 21 from 30, 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.

Let's proceed to step 10:
If we divide 90 by 21, we get 4 and a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 43241.5714
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.

On to step 11:
21 goes into 60 2 times with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 43241.57142
Subtracting 42 from 60 leaves us 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.

Moving on to step 12:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 43241.571428
If we subtract 168 from 180, we 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.

Advancing to step 13:
If we divide 120 by 21, we get 5 and a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 43241.5714285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 14:
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: 43241.57142857
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Our division results in 43241.57142857 with a remaining 3e-09.