We're dividing 159868 by 90 
We want to divide 159868 by 90.

On to step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 90

Moving on to step 2:
When dividing 15 by 90, we get 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 90

On to step 3:
159 divided by 90 is 1 with a remainder of 69.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 90 from 159, we get 69.
Append the next digit (8) from the dividend to 69 and continue with: 698 / 90

Going ahead to step 4:
90 goes into 698 7 times with a remainder of 68.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtracting 630 from 698 leaves us with 68.
Fetch the next digit (6) from the dividend, attach it to 68 and continue: 686 / 90

Going ahead to step 5:
The number 90 fits into 686 7 times, leaving a remainder of 56.
The next digit of our result is 7. 
Result so far: 177.0
Subtract 630 from 686 to get 56.
Include the next digit (8) from the dividend after 56, then repeat: 568 / 90

Going ahead to step 6:
90 goes into 568 6 times with a remainder of 28.
Record the quotient 6 as the next digit in the result. 
Result so far: 1776.0
If we subtract 540 from 568, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 7:
The number 90 fits into 280 3 times, leaving a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 1776.3
Subtract 270 from 280 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 8:
If we divide 100 by 90, we get 1 and a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 1776.31
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
The number 90 fits into 100 1 times, leaving a remainder of 10.
The next digit of our result is 1. 
Result so far: 1776.311
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 1776.311 with a remainder of 0.001.