640105 divided by 9 
We're looking to find how many times 9 goes into 640105.

Let's proceed to step 1:
6 divided by 9 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 9

On to step 2:
9 goes into 64 7 times with a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 7.0
If we subtract 63 from 64, we get 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 9

Advancing to step 3:
When dividing 10 by 9, we get 1 with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 71.0
Deduct 9 from 10 and we're left with 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 9

Let's proceed to step 4:
If we divide 11 by 9, we get 1 and a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 711.0
Subtracting 9 from 11 leaves us with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 9

Going ahead to step 5:
If we divide 20 by 9, we get 2 and a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 7112.0
Subtracting 18 from 20 leaves us with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 9

On to step 6:
9 can be fit into 25 2 times, resulting in a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 71122.0
The remainder is 7 after subtracting 18 from 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
70 divided by 9 is 7 with a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 71122.7
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
The number 9 fits into 70 7 times, leaving a remainder of 7.
The next digit of our result is 7. 
Result so far: 71122.77
If we take 63 away from 70, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 71122.77 with a remaining 0.007.