168920 divided by 90 
We want to figure out the number of times 168920 can be divided by 90.

Step 1:
90 can be fit into 1 0 times, resulting in 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.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 90

Moving on to step 2:
90 can be fit into 16 0 times, resulting in a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 16 and we're left with 16.
Bring next digit (8) of the dividend behind the 16 and repeat the process: 168 / 90

On to step 3:
168 divided by 90 is 1 with a remainder of 78.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 90 from 168 leaves us with 78.
Include the next digit (9) from the dividend after 78, then repeat: 789 / 90

Step 4:
If we divide 789 by 90, we get 8 and a remainder of 69.
Put 8 as the next digit of the answer. 
Result so far: 18.0
The remainder is 69 after subtracting 720 from 789.
Bring next digit (2) of the dividend behind the 69 and repeat the process: 692 / 90

Step 5:
692 divided by 90 is 7 with a remainder of 62.
Put 7 as the next digit of the answer. 
Result so far: 187.0
The remainder is 62 after subtracting 630 from 692.
Include the next digit (0) from the dividend after 62, then repeat: 620 / 90

Moving on to step 6:
90 can be fit into 620 6 times, resulting in a remainder of 80.
Record the quotient 6 as the next digit in the result. 
Result so far: 1876.0
If we take 540 away from 620, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 7:
90 goes into 800 8 times with a remainder of 80.
The next digit of our result is 8. 
Result so far: 1876.8
Subtracting 720 from 800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
If we divide 800 by 90, we get 8 and a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 1876.88
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final outcome is 1876.88, with a leftover of 0.08.