685239 divided by 21 
We want to divide 685239 by 21.

Advancing to step 1:
21 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 21

Moving on to step 2:
When dividing 68 by 21, we get 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 63 away from 68, we end up with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 21

Going ahead to step 3:
When dividing 55 by 21, we get 2 with a remainder of 13.
Write down 2 as next digit of the result. 
Result so far: 32.0
Subtracting 42 from 55 leaves us with 13.
Take the next digit (2) from the dividend and append it to 13, then repeat: 132 / 21

Advancing to step 4:
When dividing 132 by 21, we get 6 with a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 326.0
Subtracting 126 from 132 leaves us with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 21

On to step 5:
When dividing 63 by 21, we get 3 with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 3263.0
Deduct 63 from 63 and we're left with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 21

Step 6:
21 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 32630.0
Deduct 0 from 9 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 32630.4
Subtracting 84 from 90 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
21 goes into 60 2 times with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 32630.42
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 9:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 32630.428
The remainder is 12 after subtracting 168 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 10:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 32630.4285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 11:
21 goes into 150 7 times with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 32630.42857
If we take 147 away from 150, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 12:
If we divide 30 by 21, we get 1 and a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 32630.428571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 13:
90 divided by 21 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 32630.4285714
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 14:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The next digit of our result is 2. 
Result so far: 32630.42857142
If we subtract 42 from 60, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final result is 32630.42857142 with a remainder of 1.8e-08.