664631 ÷ 18 
Let's see how many times 18 fits into 664631.

Advancing to step 1:
The number 18 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 18

Going ahead to step 2:
66 divided by 18 is 3 with a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 54 from 66, we get 12.
Fetch the next digit (4) from the dividend, attach it to 12 and continue: 124 / 18

Let's proceed to step 3:
18 goes into 124 6 times with a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Subtracting 108 from 124 leaves us with 16.
Include the next digit (6) from the dividend after 16, then repeat: 166 / 18

Step 4:
The number 18 fits into 166 9 times, leaving a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 369.0
If we take 162 away from 166, we end up with 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 18

On to step 5:
18 goes into 43 2 times with a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 3692.0
Subtracting 36 from 43 leaves us with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 18

Advancing to step 6:
The number 18 fits into 71 3 times, leaving a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 36923.0
Deduct 54 from 71 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 7:
The number 18 fits into 170 9 times, leaving a remainder of 8.
The next digit of our result is 9. 
Result so far: 36923.9
If we subtract 162 from 170, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 8:
The number 18 fits into 80 4 times, leaving a remainder of 8.
The next digit of our result is 4. 
Result so far: 36923.94
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
If we divide 80 by 18, we get 4 and a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 36923.944
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 36923.944, and the remainder is 0.0008.