We're dividing 847707 by 21 
Let's see how many times 21 fits into 847707.

Advancing to step 1:
If we divide 8 by 21, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 21

On to step 2:
The number 21 fits into 84 4 times, leaving a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 84 away from 84, we end up with 0.
Take the next digit (7) from the dividend and append it to 0, then repeat: 7 / 21

Advancing to step 3:
The number 21 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 21

Let's proceed to step 4:
If we divide 77 by 21, we get 3 and a remainder of 14.
Record the quotient 3 as the next digit in the result. 
Result so far: 403.0
If we take 63 away from 77, we end up with 14.
Take the next digit (0) from the dividend and append it to 14, then repeat: 140 / 21

Moving on to step 5:
21 can be fit into 140 6 times, resulting in a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 4036.0
Subtract 126 from 140 to get 14.
Append the next digit (7) from the dividend to 14 and continue with: 147 / 21

Going ahead to step 6:
When dividing 147 by 21, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 40367.0
Deduct 147 from 147 and we're left 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.

Let's proceed to step 7:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 40367.0
Deduct 0 from 0 and we're left 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.

Moving on to step 8:
If we divide 0 by 21, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 40367.0
Subtracting 0 from 0 leaves us 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.

In conclusion, the division gives 40367.0 with a balance of 0.0.