We divide 159489 by 90
We want to figure out the number of times 159489 can be divided by 90.

Step 1:
90 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 90

Moving on to step 2:
90 goes into 15 0 times with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 90

Step 3:
If we divide 159 by 90, we get 1 and a remainder of 69.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 90 from 159 to get 69.
Grab the next digit (4) from the dividend, add it to 69, then carry on: 694 / 90

Step 4:
90 can be fit into 694 7 times, resulting in a remainder of 64.
Put 7 as the next digit of the answer. 
Result so far: 17.0
The remainder is 64 after subtracting 630 from 694.
Append the next digit (8) from the dividend to 64 and continue with: 648 / 90

On to step 5:
If we divide 648 by 90, we get 7 and a remainder of 18.
Put 7 as the next digit of the answer. 
Result so far: 177.0
Deduct 630 from 648 and we're left with 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 90

On to step 6:
90 goes into 189 2 times with a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 1772.0
Deduct 180 from 189 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
90 can be fit into 90 1 times, resulting in a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1772.1
If we subtract 90 from 90, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
The number 90 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1772.1
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
The number 90 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1772.1
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 1772.1 with a remaining 0.0.