We're dividing 171159 by 86 
We want to divide 171159 by 86.

Let's proceed to step 1:
86 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 86

Let's proceed to step 2:
86 can be fit into 17 0 times, resulting in a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Include the next digit (1) from the dividend after 17, then repeat: 171 / 86

Going ahead to step 3:
If we divide 171 by 86, we get 1 and a remainder of 85.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 86 from 171 leaves us with 85.
Append the next digit (1) from the dividend to 85 and continue with: 851 / 86

Step 4:
86 can be fit into 851 9 times, resulting in a remainder of 77.
Use 9 as the next digit of our solution. 
Result so far: 19.0
If we take 774 away from 851, we end up with 77.
Grab the next digit (5) from the dividend, add it to 77, then carry on: 775 / 86

Let's proceed to step 5:
86 can be fit into 775 9 times, resulting in a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 199.0
Subtract 774 from 775 to get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 86

On to step 6:
86 goes into 19 0 times with a remainder of 19.
The number 0 becomes the next digit in our result. 
Result so far: 1990.0
Subtracting 0 from 19 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
If we divide 190 by 86, we get 2 and a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 1990.2
Subtract 172 from 190 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 8:
86 can be fit into 180 2 times, resulting in a remainder of 8.
The next digit of our result is 2. 
Result so far: 1990.22
Subtracting 172 from 180 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 1990.22 with a balance of 0.008.