We divide 173040 by 90
Our goal is to divide 173040 by 90.

Going ahead to step 1:
1 divided by 90 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 90

On to step 2:
If we divide 17 by 90, we get 0 and a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Fetch the next digit (3) from the dividend, attach it to 17 and continue: 173 / 90

Step 3:
The number 90 fits into 173 1 times, leaving a remainder of 83.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 83 after subtracting 90 from 173.
Fetch the next digit (0) from the dividend, attach it to 83 and continue: 830 / 90

Step 4:
When dividing 830 by 90, we get 9 with a remainder of 20.
The next digit of our result is 9. 
Result so far: 19.0
The remainder is 20 after subtracting 810 from 830.
Take the next digit (4) from the dividend and append it to 20, then repeat: 204 / 90

Let's proceed to step 5:
When dividing 204 by 90, we get 2 with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 192.0
The remainder is 24 after subtracting 180 from 204.
Bring next digit (0) of the dividend behind the 24 and repeat the process: 240 / 90

Step 6:
When dividing 240 by 90, we get 2 with a remainder of 60.
Put 2 as the next digit of the answer. 
Result so far: 1922.0
Deduct 180 from 240 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 7:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 1922.6
The remainder is 60 after subtracting 540 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
600 divided by 90 is 6 with a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 1922.66
Deduct 540 from 600 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The quotient of the division is 1922.66, and the remainder is 0.06.