We divide 172598 by 90
We want to divide 172598 by 90.

Going ahead to step 1:
When dividing 1 by 90, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 90

Moving on to step 2:
90 goes into 17 0 times with a remainder of 17.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 17, we get 17.
Fetch the next digit (2) from the dividend, attach it to 17 and continue: 172 / 90

Step 3:
If we divide 172 by 90, we get 1 and a remainder of 82.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 90 away from 172, we end up with 82.
Include the next digit (5) from the dividend after 82, then repeat: 825 / 90

Step 4:
The number 90 fits into 825 9 times, leaving a remainder of 15.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtract 810 from 825 to get 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 90

Let's proceed to step 5:
When dividing 159 by 90, we get 1 with a remainder of 69.
The next digit of our result is 1. 
Result so far: 191.0
Subtract 90 from 159 to get 69.
Include the next digit (8) from the dividend after 69, then repeat: 698 / 90

Step 6:
The number 90 fits into 698 7 times, leaving a remainder of 68.
Write down 7 as next digit of the result. 
Result so far: 1917.0
Subtracting 630 from 698 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 7:
The number 90 fits into 680 7 times, leaving a remainder of 50.
The next digit of our result is 7. 
Result so far: 1917.7
If we subtract 630 from 680, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
If we divide 500 by 90, we get 5 and a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 1917.75
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
If we divide 500 by 90, we get 5 and a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 1917.755
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The quotient of the division is 1917.755, and the remainder is 0.005.