660609 ÷ 9 
We're looking to find how many times 9 goes into 660609.

On to step 1:
9 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 9

Moving on to step 2:
When dividing 66 by 9, we get 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 63 from 66, we get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 9

Advancing to step 3:
The number 9 fits into 30 3 times, leaving a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 73.0
Subtracting 27 from 30 leaves us with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 9

Advancing to step 4:
9 can be fit into 36 4 times, resulting in a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 734.0
The remainder is 0 after subtracting 36 from 36.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 9

Moving on to step 5:
0 divided by 9 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 7340.0
If we take 0 away from 0, we end up with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 9

Moving on to step 6:
When dividing 9 by 9, we get 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 73401.0
Deduct 9 from 9 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.

On to step 7:
When dividing 0 by 9, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 73401.0
Subtract 0 from 0 to get 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:
9 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 73401.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 73401.0 with a balance of 0.0.