Let's divide 256491 by 85
We want to divide 256491 by 85.

Advancing to step 1:
If we divide 2 by 85, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 85

On to step 2:
If we divide 25 by 85, we get 0 and a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Grab the next digit (6) from the dividend, add it to 25, then carry on: 256 / 85

Going ahead to step 3:
256 divided by 85 is 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 1 after subtracting 255 from 256.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 85

Let's proceed to step 4:
14 divided by 85 is 0 with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 30.0
Subtracting 0 from 14 leaves us with 14.
Bring next digit (9) of the dividend behind the 14 and repeat the process: 149 / 85

Going ahead to step 5:
The number 85 fits into 149 1 times, leaving a remainder of 64.
Put 1 as the next digit of the answer. 
Result so far: 301.0
If we take 85 away from 149, we end up with 64.
Include the next digit (1) from the dividend after 64, then repeat: 641 / 85

Moving on to step 6:
85 can be fit into 641 7 times, resulting in a remainder of 46.
The next digit of our result is 7. 
Result so far: 3017.0
Deduct 595 from 641 and we're left with 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 7:
460 divided by 85 is 5 with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 3017.5
Subtracting 425 from 460 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 8:
85 goes into 350 4 times with a remainder of 10.
The next digit of our result is 4. 
Result so far: 3017.54
Subtract 340 from 350 to 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.

Moving on to step 9:
If we divide 100 by 85, we get 1 and a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 3017.541
Subtracting 85 from 100 leaves us with 15.
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 10:
If we divide 150 by 85, we get 1 and a remainder of 65.
Write down 1 as next digit of the result. 
Result so far: 3017.5411
Subtracting 85 from 150 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The final result is 3017.5411 with a remainder of 0.00065.