We're dividing 747089 by 21 
We're looking to find how many times 21 goes into 747089.

Let's proceed to step 1:
If we divide 7 by 21, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 21

On to step 2:
The number 21 fits into 74 3 times, leaving a remainder of 11.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 63 from 74 leaves us with 11.
Fetch the next digit (7) from the dividend, attach it to 11 and continue: 117 / 21

Going ahead to step 3:
When dividing 117 by 21, we get 5 with a remainder of 12.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
Deduct 105 from 117 and we're left with 12.
Take the next digit (0) from the dividend and append it to 12, then repeat: 120 / 21

Advancing to step 4:
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: 355.0
The remainder is 15 after subtracting 105 from 120.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 21

Step 5:
158 divided by 21 is 7 with a remainder of 11.
Put 7 as the next digit of the answer. 
Result so far: 3557.0
If we subtract 147 from 158, we get 11.
Bring next digit (9) of the dividend behind the 11 and repeat the process: 119 / 21

Moving on to step 6:
The number 21 fits into 119 5 times, leaving a remainder of 14.
Use 5 as the next digit of our solution. 
Result so far: 35575.0
Deduct 105 from 119 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
When dividing 140 by 21, we get 6 with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 35575.6
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 8:
21 can be fit into 140 6 times, resulting in a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 35575.66
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 35575.66, with a leftover of 0.014.