Let's divide 18390 by 9
We want to divide 18390 by 9.

Going ahead to step 1:
9 can be fit into 1 0 times, resulting in 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.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 9

On to step 2:
9 goes into 18 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 0 after subtracting 18 from 18.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 9

Step 3:
3 divided by 9 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 9

Let's proceed to step 4:
39 divided by 9 is 4 with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 204.0
The remainder is 3 after subtracting 36 from 39.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 9

Advancing to step 5:
The number 9 fits into 30 3 times, leaving a remainder of 3.
The next digit of our result is 3. 
Result so far: 2043.0
Subtract 27 from 30 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 6:
30 divided by 9 is 3 with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 2043.3
If we subtract 27 from 30, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
9 can be fit into 30 3 times, resulting in a remainder of 3.
The next digit of our result is 3. 
Result so far: 2043.33
If we subtract 27 from 30, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

After the division, we end up with 2043.33 and a remainder of 0.003.