We're dividing 964689 by 21 
We want to figure out the number of times 964689 can be divided by 21.

Going ahead to step 1:
21 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 21

Advancing to step 2:
When dividing 96 by 21, we get 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 84 from 96 and we're left with 12.
Include the next digit (4) from the dividend after 12, then repeat: 124 / 21

Let's proceed to step 3:
The number 21 fits into 124 5 times, leaving a remainder of 19.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
Subtract 105 from 124 to get 19.
Append the next digit (6) from the dividend to 19 and continue with: 196 / 21

Moving on to step 4:
21 goes into 196 9 times with a remainder of 7.
Write down 9 as next digit of the result. 
Result so far: 459.0
Subtract 189 from 196 to get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 21

Moving on to step 5:
The number 21 fits into 78 3 times, leaving a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 4593.0
Deduct 63 from 78 and we're left with 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 21

On to step 6:
When dividing 159 by 21, we get 7 with a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 45937.0
Subtracting 147 from 159 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
120 divided by 21 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 45937.5
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.

On to step 8:
21 goes into 150 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 45937.57
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.

Let's proceed to step 9:
The number 21 fits into 30 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 45937.571
Subtracting 21 from 30 leaves us with 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:
21 goes into 90 4 times with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 45937.5714
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 11:
21 goes into 60 2 times with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 45937.57142
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.

Going ahead to step 12:
If we divide 180 by 21, we get 8 and a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 45937.571428
Deduct 168 from 180 and we're left with 12.
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 13:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 45937.5714285
If we take 105 away from 120, we end up with 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 14:
When dividing 150 by 21, we get 7 with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 45937.57142857
Subtracting 147 from 150 leaves us 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.

After the division, we end up with 45937.57142857 and a remainder of 3e-09.