Let's divide 917645 by 21
We want to divide 917645 by 21.

Going ahead to step 1:
9 divided by 21 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 21

On to step 2:
If we divide 91 by 21, we get 4 and a remainder of 7.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 84 from 91, we get 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 21

Going ahead to step 3:
The number 21 fits into 77 3 times, leaving a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 43.0
Subtract 63 from 77 to get 14.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 21

Step 4:
21 can be fit into 146 6 times, resulting in a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 436.0
If we subtract 126 from 146, we get 20.
Fetch the next digit (4) from the dividend, attach it to 20 and continue: 204 / 21

Advancing to step 5:
204 divided by 21 is 9 with a remainder of 15.
Use 9 as the next digit of our solution. 
Result so far: 4369.0
Deduct 189 from 204 and we're left with 15.
Append the next digit (5) from the dividend to 15 and continue with: 155 / 21

Step 6:
If we divide 155 by 21, we get 7 and a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 43697.0
If we take 147 away from 155, we end up with 8.
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 7:
The number 21 fits into 80 3 times, leaving a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 43697.3
Subtracting 63 from 80 leaves us with 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 8:
170 divided by 21 is 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 43697.38
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.

Advancing to step 9:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 43697.38
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.

Moving on to step 10:
21 goes into 200 9 times with a remainder of 11.
The next digit of our result is 9. 
Result so far: 43697.3809
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.

Let's proceed to step 11:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 43697.38095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 12:
When dividing 50 by 21, we get 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 43697.380952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 13:
21 goes into 80 3 times with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 43697.3809523
If we take 63 away from 80, we end up with 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 14:
170 divided by 21 is 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 43697.38095238
If we take 168 away from 170, 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.

In conclusion, the division gives 43697.38095238 with a balance of 2e-09.