Let's divide 747705 by 21
Our goal is to divide 747705 by 21.

Advancing to step 1:
21 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 21

Step 2:
The number 21 fits into 74 3 times, leaving a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 63 from 74 and we're left with 11.
Fetch the next digit (7) from the dividend, attach it to 11 and continue: 117 / 21

Advancing to step 3:
The number 21 fits into 117 5 times, leaving a remainder of 12.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
If we take 105 away from 117, we end up with 12.
Append the next digit (7) from the dividend to 12 and continue with: 127 / 21

Moving on to step 4:
If we divide 127 by 21, we get 6 and a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 356.0
Subtracting 126 from 127 leaves us with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 21

Step 5:
The number 21 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 3560.0
If we subtract 0 from 10, we get 10.
Fetch the next digit (5) from the dividend, attach it to 10 and continue: 105 / 21

Step 6:
105 divided by 21 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 35605.0
Subtract 105 from 105 to 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.

On to step 7:
The number 21 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 35605.0
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.

Going ahead to step 8:
The number 21 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 35605.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 35605.0, and the remainder is 0.0.