We look at the division of 743317 by 21 
We want to figure out the number of times 743317 can be divided by 21.

Let's proceed to step 1:
7 divided by 21 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 21

Moving on to step 2:
When dividing 74 by 21, we get 3 with a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 63 from 74 and we're left with 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 21

Step 3:
21 can be fit into 113 5 times, resulting in a remainder of 8.
The next digit of our result is 5. 
Result so far: 35.0
If we subtract 105 from 113, we get 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 21

Step 4:
83 divided by 21 is 3 with a remainder of 20.
Use 3 as the next digit of our solution. 
Result so far: 353.0
If we take 63 away from 83, we end up with 20.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 21

Going ahead to step 5:
When dividing 201 by 21, we get 9 with a remainder of 12.
Use 9 as the next digit of our solution. 
Result so far: 3539.0
Subtracting 189 from 201 leaves us with 12.
Append the next digit (7) from the dividend to 12 and continue with: 127 / 21

Let's proceed to step 6:
If we divide 127 by 21, we get 6 and a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 35396.0
If we subtract 126 from 127, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
When dividing 10 by 21, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 35396.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
21 can be fit into 100 4 times, resulting in a remainder of 16.
The next digit of our result is 4. 
Result so far: 35396.04
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
21 can be fit into 160 7 times, resulting in a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 35396.047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 10:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 35396.0476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 11:
The number 21 fits into 40 1 times, leaving a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 35396.04761
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 12:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 35396.047619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 13:
21 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 35396.047619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 14:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 35396.04761904
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 35396.04761904 with a remainder of 1.6e-08.