We divide 21688 by 86
We want to divide 21688 by 86.

Step 1:
If we divide 2 by 86, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 86

Step 2:
When dividing 21 by 86, we get 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Grab the next digit (6) from the dividend, add it to 21, then carry on: 216 / 86

Step 3:
86 goes into 216 2 times with a remainder of 44.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 172 from 216, we get 44.
Append the next digit (8) from the dividend to 44 and continue with: 448 / 86

Let's proceed to step 4:
If we divide 448 by 86, we get 5 and a remainder of 18.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Deduct 430 from 448 and we're left with 18.
Include the next digit (8) from the dividend after 18, then repeat: 188 / 86

Advancing to step 5:
86 can be fit into 188 2 times, resulting in a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 252.0
Subtract 172 from 188 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 6:
160 divided by 86 is 1 with a remainder of 74.
The number 1 becomes the next digit in our result. 
Result so far: 252.1
Subtracting 86 from 160 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 7:
The number 86 fits into 740 8 times, leaving a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 252.18
If we subtract 688 from 740, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 8:
86 can be fit into 520 6 times, resulting in a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 252.186
The remainder is 4 after subtracting 516 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
86 goes into 40 0 times with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 252.186
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
86 can be fit into 400 4 times, resulting in a remainder of 56.
The next digit of our result is 4. 
Result so far: 252.18604
If we take 344 away from 400, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 11:
When dividing 560 by 86, we get 6 with a remainder of 44.
The next digit of our result is 6. 
Result so far: 252.186046
The remainder is 44 after subtracting 516 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 12:
The number 86 fits into 440 5 times, leaving a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 252.1860465
If we subtract 430 from 440, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 13:
86 goes into 100 1 times with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 252.18604651
If we take 86 away from 100, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 252.18604651 with a balance of 1.4e-08.