We divide 391635 by 18
Let's see how many times 18 fits into 391635.

Step 1:
The number 18 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 18

Advancing to step 2:
When dividing 39 by 18, we get 2 with a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 36 from 39 leaves us with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 18

On to step 3:
The number 18 fits into 31 1 times, leaving a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 21.0
Subtract 18 from 31 to get 13.
Include the next digit (6) from the dividend after 13, then repeat: 136 / 18

Going ahead to step 4:
The number 18 fits into 136 7 times, leaving a remainder of 10.
The next digit of our result is 7. 
Result so far: 217.0
The remainder is 10 after subtracting 126 from 136.
Bring next digit (3) of the dividend behind the 10 and repeat the process: 103 / 18

Advancing to step 5:
The number 18 fits into 103 5 times, leaving a remainder of 13.
Put 5 as the next digit of the answer. 
Result so far: 2175.0
Subtract 90 from 103 to get 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 18

On to step 6:
If we divide 135 by 18, we get 7 and a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 21757.0
Deduct 126 from 135 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
90 divided by 18 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 21757.5
Subtracting 90 from 90 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
18 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 21757.5
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
When dividing 0 by 18, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 21757.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 21757.5 with a remainder of 0.0.