Let's divide 640808 by 18
Let's see how many times 18 fits into 640808.

Going ahead to step 1:
6 divided by 18 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 18

On to step 2:
When dividing 64 by 18, we get 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 54 from 64 leaves us with 10.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 18

Step 3:
When dividing 100 by 18, we get 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 35.0
Subtract 90 from 100 to get 10.
Append the next digit (8) from the dividend to 10 and continue with: 108 / 18

Step 4:
18 can be fit into 108 6 times, resulting in a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 356.0
If we take 108 away from 108, we end up with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 18

Step 5:
18 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3560.0
If we take 0 away from 0, we end up with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 18

On to step 6:
The number 18 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 35600.0
Deduct 0 from 8 and we're left with 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 7:
18 goes into 80 4 times with a remainder of 8.
The next digit of our result is 4. 
Result so far: 35600.4
If we take 72 away from 80, we end up with 8.
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 8:
80 divided by 18 is 4 with a remainder of 8.
The next digit of our result is 4. 
Result so far: 35600.44
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.

After the division, we end up with 35600.44 and a remainder of 0.008.