668647 ÷ 9 
We want to figure out the number of times 668647 can be divided by 9.

On to step 1:
When dividing 6 by 9, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 9

Going ahead to step 2:
If we divide 66 by 9, we get 7 and a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 63 away from 66, we end up with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 9

On to step 3:
When dividing 38 by 9, we get 4 with a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 74.0
Subtract 36 from 38 to get 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 9

On to step 4:
When dividing 26 by 9, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 742.0
The remainder is 8 after subtracting 18 from 26.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 9

Moving on to step 5:
When dividing 84 by 9, we get 9 with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 7429.0
If we take 81 away from 84, we end up with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 9

Step 6:
If we divide 37 by 9, we get 4 and a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 74294.0
The remainder is 1 after subtracting 36 from 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
When dividing 10 by 9, we get 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 74294.1
Subtract 9 from 10 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 8:
9 goes into 10 1 times with a remainder of 1.
The next digit of our result is 1. 
Result so far: 74294.11
Subtract 9 from 10 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 74294.11 and a remainder of 0.001.