744546 divided by 21 
We want to figure out the number of times 744546 can be divided by 21.

Going ahead to step 1:
7 divided by 21 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 21

Step 2:
74 divided by 21 is 3 with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 11 after subtracting 63 from 74.
Include the next digit (4) from the dividend after 11, then repeat: 114 / 21

Advancing to step 3:
If we divide 114 by 21, we get 5 and a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
Deduct 105 from 114 and we're left with 9.
Bring next digit (5) of the dividend behind the 9 and repeat the process: 95 / 21

Step 4:
The number 21 fits into 95 4 times, leaving a remainder of 11.
The next digit of our result is 4. 
Result so far: 354.0
Subtract 84 from 95 to get 11.
Include the next digit (4) from the dividend after 11, then repeat: 114 / 21

On to step 5:
21 can be fit into 114 5 times, resulting in a remainder of 9.
The next digit of our result is 5. 
Result so far: 3545.0
Deduct 105 from 114 and we're left with 9.
Grab the next digit (6) from the dividend, add it to 9, then carry on: 96 / 21

Step 6:
21 can be fit into 96 4 times, resulting in a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 35454.0
If we subtract 84 from 96, 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.

Step 7:
120 divided by 21 is 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 35454.5
Subtracting 105 from 120 leaves us 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.

On to step 8:
If we divide 150 by 21, we get 7 and a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 35454.57
If we take 147 away from 150, we end up 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.

Step 9:
21 goes into 30 1 times with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 35454.571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 10:
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: 35454.5714
Deduct 84 from 90 and we're left 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.

Going ahead to step 11:
If we divide 60 by 21, we get 2 and a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 35454.57142
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.

Advancing to step 12:
180 divided by 21 is 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 35454.571428
Subtracting 168 from 180 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 13:
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: 35454.5714285
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.

Let's proceed to step 14:
21 goes into 150 7 times with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 35454.57142857
Deduct 147 from 150 and we're left 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.

The final outcome is 35454.57142857, with a leftover of 3e-09.