170382 ÷ 90 
We're looking to find how many times 90 goes into 170382.

On to step 1:
90 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
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

Going ahead to step 2:
The number 90 fits into 17 0 times, leaving a remainder of 17.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 90

On to step 3:
If we divide 170 by 90, we get 1 and a remainder of 80.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 90 from 170 to get 80.
Grab the next digit (3) from the dividend, add it to 80, then carry on: 803 / 90

On to step 4:
When dividing 803 by 90, we get 8 with a remainder of 83.
Write down 8 as next digit of the result. 
Result so far: 18.0
If we subtract 720 from 803, we get 83.
Bring next digit (8) of the dividend behind the 83 and repeat the process: 838 / 90

Step 5:
The number 90 fits into 838 9 times, leaving a remainder of 28.
Write down 9 as next digit of the result. 
Result so far: 189.0
Subtract 810 from 838 to get 28.
Append the next digit (2) from the dividend to 28 and continue with: 282 / 90

On to step 6:
90 goes into 282 3 times with a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 1893.0
The remainder is 12 after subtracting 270 from 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
120 divided by 90 is 1 with a remainder of 30.
The next digit of our result is 1. 
Result so far: 1893.1
Subtract 90 from 120 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 1893.13
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
If we divide 300 by 90, we get 3 and a remainder of 30.
The next digit of our result is 3. 
Result so far: 1893.133
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 1893.133 with a remaining 0.003.