We're dividing 685128 by 21 
Our goal is to divide 685128 by 21.

Let's proceed to step 1:
21 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 21

Advancing to step 2:
The number 21 fits into 68 3 times, leaving a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 63 from 68, we get 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 21

Going ahead to step 3:
When dividing 55 by 21, we get 2 with a remainder of 13.
Use 2 as the next digit of our solution. 
Result so far: 32.0
Subtracting 42 from 55 leaves us with 13.
Grab the next digit (1) from the dividend, add it to 13, then carry on: 131 / 21

Advancing to step 4:
21 goes into 131 6 times with a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 326.0
The remainder is 5 after subtracting 126 from 131.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 21

Advancing to step 5:
If we divide 52 by 21, we get 2 and a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 3262.0
The remainder is 10 after subtracting 42 from 52.
Grab the next digit (8) from the dividend, add it to 10, then carry on: 108 / 21

On to step 6:
21 can be fit into 108 5 times, resulting in a remainder of 3.
Put 5 as the next digit of the answer. 
Result so far: 32625.0
Subtract 105 from 108 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
30 divided by 21 is 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 32625.1
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.

Going ahead to step 8:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 32625.14
If we take 84 away from 90, we end up 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.

Advancing to step 9:
When dividing 60 by 21, we get 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 32625.142
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.

Step 10:
When dividing 180 by 21, we get 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 32625.1428
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 11:
The number 21 fits into 120 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 32625.14285
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.

Step 12:
150 divided by 21 is 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 32625.142857
Subtracting 147 from 150 leaves us 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.

Moving on to step 13:
The number 21 fits into 30 1 times, leaving a remainder of 9.
The next digit of our result is 1. 
Result so far: 32625.1428571
If we subtract 21 from 30, we 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.

Going ahead to step 14:
21 goes into 90 4 times with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 32625.14285714
Deduct 84 from 90 and we're left 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.

Our division results in 32625.14285714 with a remaining 6e-09.