Let's divide 172068 by 90
Let's see how many times 90 fits into 172068.

Step 1:
When dividing 1 by 90, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 90

Step 2:
90 goes into 17 0 times with 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.
Take the next digit (2) from the dividend and append it to 17, then repeat: 172 / 90

Let's proceed to step 3:
If we divide 172 by 90, we get 1 and a remainder of 82.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 90 from 172 and we're left with 82.
Bring next digit (0) of the dividend behind the 82 and repeat the process: 820 / 90

Let's proceed to step 4:
The number 90 fits into 820 9 times, leaving a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 810 from 820 leaves us with 10.
Bring next digit (6) of the dividend behind the 10 and repeat the process: 106 / 90

Step 5:
90 can be fit into 106 1 times, resulting in a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 191.0
The remainder is 16 after subtracting 90 from 106.
Include the next digit (8) from the dividend after 16, then repeat: 168 / 90

On to step 6:
When dividing 168 by 90, we get 1 with a remainder of 78.
The next digit of our result is 1. 
Result so far: 1911.0
If we subtract 90 from 168, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 7:
90 goes into 780 8 times with a remainder of 60.
The next digit of our result is 8. 
Result so far: 1911.8
The remainder is 60 after subtracting 720 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 8:
90 can be fit into 600 6 times, resulting in a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 1911.86
If we subtract 540 from 600, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
The number 90 fits into 600 6 times, leaving a remainder of 60.
Use 6 as the next digit of our solution. 
Result so far: 1911.866
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 1911.866, and the remainder is 0.006.