We look at the division of 256931 by 86 
Let's see how many times 86 fits into 256931.

Step 1:
86 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 86

Step 2:
86 goes into 25 0 times with a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 25 leaves us with 25.
Fetch the next digit (6) from the dividend, attach it to 25 and continue: 256 / 86

On to step 3:
If we divide 256 by 86, we get 2 and a remainder of 84.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 172 from 256 to get 84.
Take the next digit (9) from the dividend and append it to 84, then repeat: 849 / 86

Let's proceed to step 4:
When dividing 849 by 86, we get 9 with a remainder of 75.
Use 9 as the next digit of our solution. 
Result so far: 29.0
Deduct 774 from 849 and we're left with 75.
Grab the next digit (3) from the dividend, add it to 75, then carry on: 753 / 86

Going ahead to step 5:
753 divided by 86 is 8 with a remainder of 65.
Write down 8 as next digit of the result. 
Result so far: 298.0
Deduct 688 from 753 and we're left with 65.
Take the next digit (1) from the dividend and append it to 65, then repeat: 651 / 86

Going ahead to step 6:
86 goes into 651 7 times with a remainder of 49.
Record the quotient 7 as the next digit in the result. 
Result so far: 2987.0
Subtract 602 from 651 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 7:
86 can be fit into 490 5 times, resulting in a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 2987.5
If we subtract 430 from 490, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
If we divide 600 by 86, we get 6 and a remainder of 84.
Record the quotient 6 as the next digit in the result. 
Result so far: 2987.56
If we subtract 516 from 600, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 9:
When dividing 840 by 86, we get 9 with a remainder of 66.
The number 9 becomes the next digit in our result. 
Result so far: 2987.569
If we subtract 774 from 840, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 10:
86 goes into 660 7 times with a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 2987.5697
Subtracting 602 from 660 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 11:
The number 86 fits into 580 6 times, leaving a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 2987.56976
Deduct 516 from 580 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 12:
86 goes into 640 7 times with a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 2987.569767
Deduct 602 from 640 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 13:
380 divided by 86 is 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 2987.5697674
Deduct 344 from 380 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 14:
When dividing 360 by 86, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 2987.56976744
The remainder is 16 after subtracting 344 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 2987.56976744 and a remainder of 1.6e-08.