681525 ÷ 21 
Let's see how many times 21 fits into 681525.

Advancing to step 1:
When dividing 6 by 21, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 21

Step 2:
If we divide 68 by 21, we get 3 and a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 5 after subtracting 63 from 68.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 21

Moving on to step 3:
If we divide 51 by 21, we get 2 and a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
Deduct 42 from 51 and we're left with 9.
Include the next digit (5) from the dividend after 9, then repeat: 95 / 21

Advancing to step 4:
When dividing 95 by 21, we get 4 with a remainder of 11.
Write down 4 as next digit of the result. 
Result so far: 324.0
The remainder is 11 after subtracting 84 from 95.
Append the next digit (2) from the dividend to 11 and continue with: 112 / 21

Let's proceed to step 5:
If we divide 112 by 21, we get 5 and a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 3245.0
Subtracting 105 from 112 leaves us with 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 21

Step 6:
21 can be fit into 75 3 times, resulting in a remainder of 12.
Use 3 as the next digit of our solution. 
Result so far: 32453.0
The remainder is 12 after subtracting 63 from 75.
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 7:
If we divide 120 by 21, we get 5 and a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 32453.5
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.

On to step 8:
If we divide 150 by 21, we get 7 and a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 32453.57
Subtract 147 from 150 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.

Advancing to step 9:
21 goes into 30 1 times with a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 32453.571
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 10:
When dividing 90 by 21, we get 4 with a remainder of 6.
The next digit of our result is 4. 
Result so far: 32453.5714
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.

Let's proceed to step 11:
60 divided by 21 is 2 with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 32453.57142
Subtracting 42 from 60 leaves us 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.

Advancing to step 12:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 32453.571428
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.

Moving on to step 13:
120 divided by 21 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 32453.5714285
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 14:
150 divided by 21 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 32453.57142857
Deduct 147 from 150 and we're left 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.

Our division results in 32453.57142857 with a remaining 3e-09.