664620 divided by 9 
Let's see how many times 9 fits into 664620.

Step 1:
6 divided by 9 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 9

Let's proceed to step 2:
66 divided by 9 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we subtract 63 from 66, we get 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 9

Advancing to step 3:
9 can be fit into 34 3 times, resulting in a remainder of 7.
The next digit of our result is 3. 
Result so far: 73.0
If we subtract 27 from 34, we get 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 9

Moving on to step 4:
When dividing 76 by 9, we get 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 738.0
If we subtract 72 from 76, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 9

Moving on to step 5:
42 divided by 9 is 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 7384.0
Subtract 36 from 42 to get 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 9

Let's proceed to step 6:
When dividing 60 by 9, we get 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 73846.0
The remainder is 6 after subtracting 54 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 7:
When dividing 60 by 9, we get 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 73846.6
The remainder is 6 after subtracting 54 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
If we divide 60 by 9, we get 6 and a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 73846.66
The remainder is 6 after subtracting 54 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Our division results in 73846.66 with a remaining 0.006.