Let's divide 21785 by 86
Our goal is to divide 21785 by 86.

Advancing to step 1:
When dividing 2 by 86, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 86

Going ahead to step 2:
The number 86 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Include the next digit (7) from the dividend after 21, then repeat: 217 / 86

On to step 3:
When dividing 217 by 86, we get 2 with a remainder of 45.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 172 from 217, we get 45.
Append the next digit (8) from the dividend to 45 and continue with: 458 / 86

On to step 4:
86 goes into 458 5 times with a remainder of 28.
Put 5 as the next digit of the answer. 
Result so far: 25.0
If we take 430 away from 458, we end up with 28.
Fetch the next digit (5) from the dividend, attach it to 28 and continue: 285 / 86

Moving on to step 5:
If we divide 285 by 86, we get 3 and a remainder of 27.
The next digit of our result is 3. 
Result so far: 253.0
Deduct 258 from 285 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 6:
86 goes into 270 3 times with a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 253.3
Subtract 258 from 270 to get 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 7:
The number 86 fits into 120 1 times, leaving a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 253.31
The remainder is 34 after subtracting 86 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 8:
340 divided by 86 is 3 with a remainder of 82.
Use 3 as the next digit of our solution. 
Result so far: 253.313
Subtracting 258 from 340 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 9:
820 divided by 86 is 9 with a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 253.3139
If we subtract 774 from 820, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 10:
86 goes into 460 5 times with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 253.31395
The remainder is 30 after subtracting 430 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 11:
86 goes into 300 3 times with a remainder of 42.
The number 3 becomes the next digit in our result. 
Result so far: 253.313953
Deduct 258 from 300 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 12:
86 goes into 420 4 times with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 253.3139534
Subtracting 344 from 420 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

On to step 13:
The number 86 fits into 760 8 times, leaving a remainder of 72.
The number 8 becomes the next digit in our result. 
Result so far: 253.31395348
Subtract 688 from 760 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

In conclusion, the division gives 253.31395348 with a balance of 7.2e-08.