Let's divide 964383 by 21
We want to figure out the number of times 964383 can be divided by 21.

Advancing to step 1:
When dividing 9 by 21, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (6) from the dividend after 9, then repeat: 96 / 21

On to step 2:
96 divided by 21 is 4 with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 84 from 96 leaves us with 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 21

Moving on to step 3:
21 can be fit into 124 5 times, resulting in a remainder of 19.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
If we take 105 away from 124, we end up with 19.
Include the next digit (3) from the dividend after 19, then repeat: 193 / 21

Step 4:
21 goes into 193 9 times with a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 459.0
The remainder is 4 after subtracting 189 from 193.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 21

Moving on to step 5:
When dividing 48 by 21, we get 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 4592.0
Deduct 42 from 48 and we're left with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 21

On to step 6:
If we divide 63 by 21, we get 3 and a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 45923.0
If we subtract 63 from 63, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 45923.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
21 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 45923.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 45923.0 with a remaining 0.0.