We're dividing 526688 by 21 
Let's see how many times 21 fits into 526688.

On to step 1:
If we divide 5 by 21, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 21

Step 2:
The number 21 fits into 52 2 times, leaving a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 42 from 52 leaves us with 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 21

Moving on to step 3:
106 divided by 21 is 5 with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
If we subtract 105 from 106, we get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 21

Let's proceed to step 4:
If we divide 16 by 21, we get 0 and a remainder of 16.
The next digit of our result is 0. 
Result so far: 250.0
Subtract 0 from 16 to get 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 21

Moving on to step 5:
If we divide 168 by 21, we get 8 and a remainder of 0.
The next digit of our result is 8. 
Result so far: 2508.0
Deduct 168 from 168 and we're left with 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 21

On to step 6:
When dividing 8 by 21, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 25080.0
If we subtract 0 from 8, we 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.

On to step 7:
If we divide 80 by 21, we get 3 and a remainder of 17.
The next digit of our result is 3. 
Result so far: 25080.3
If we take 63 away from 80, we end up 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.

Let's proceed to step 8:
21 goes into 170 8 times with a remainder of 2.
The next digit of our result is 8. 
Result so far: 25080.38
Subtract 168 from 170 to 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.

Step 9:
When dividing 20 by 21, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 25080.38
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
The number 21 fits into 200 9 times, leaving a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 25080.3809
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.

On to step 11:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 25080.38095
Deduct 105 from 110 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 12:
When dividing 50 by 21, we get 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 25080.380952
If we subtract 42 from 50, we 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.

Step 13:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 25080.3809523
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 14:
21 can be fit into 170 8 times, resulting in a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 25080.38095238
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.

Our division results in 25080.38095238 with a remaining 2e-09.