We look at the division of 784688 by 21 
We want to divide 784688 by 21.

Moving on to step 1:
The number 21 fits into 7 0 times, leaving a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 21

Step 2:
If we divide 78 by 21, we get 3 and a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 15 after subtracting 63 from 78.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 21

Advancing to step 3:
21 goes into 154 7 times with a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
If we take 147 away from 154, we end up with 7.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 21

Going ahead to step 4:
76 divided by 21 is 3 with a remainder of 13.
The next digit of our result is 3. 
Result so far: 373.0
If we subtract 63 from 76, we get 13.
Bring next digit (8) of the dividend behind the 13 and repeat the process: 138 / 21

Going ahead to step 5:
If we divide 138 by 21, we get 6 and a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 3736.0
Deduct 126 from 138 and we're left with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 21

Moving on to step 6:
21 can be fit into 128 6 times, resulting in a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 37366.0
Subtracting 126 from 128 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 37366.0
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 37366.09
Deduct 189 from 200 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 9:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 37366.095
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 10:
When dividing 50 by 21, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 37366.0952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 11:
21 goes into 80 3 times with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 37366.09523
Deduct 63 from 80 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 12:
170 divided by 21 is 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 37366.095238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 13:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 37366.095238
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 14:
The number 21 fits into 200 9 times, leaving a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 37366.09523809
Subtracting 189 from 200 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

In conclusion, the division gives 37366.09523809 with a balance of 1.1e-08.