We're dividing 668742 by 80 
Let's see how many times 80 fits into 668742.

On to step 1:
6 divided by 80 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 80

Advancing to step 2:
If we divide 66 by 80, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Append the next digit (8) from the dividend to 66 and continue with: 668 / 80

Step 3:
80 goes into 668 8 times with a remainder of 28.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we take 640 away from 668, we end up with 28.
Append the next digit (7) from the dividend to 28 and continue with: 287 / 80

Going ahead to step 4:
287 divided by 80 is 3 with a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 83.0
If we subtract 240 from 287, we get 47.
Bring next digit (4) of the dividend behind the 47 and repeat the process: 474 / 80

On to step 5:
When dividing 474 by 80, we get 5 with a remainder of 74.
Write down 5 as next digit of the result. 
Result so far: 835.0
Subtracting 400 from 474 leaves us with 74.
Fetch the next digit (2) from the dividend, attach it to 74 and continue: 742 / 80

Let's proceed to step 6:
742 divided by 80 is 9 with a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 8359.0
If we take 720 away from 742, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 7:
When dividing 220 by 80, we get 2 with a remainder of 60.
The next digit of our result is 2. 
Result so far: 8359.2
If we subtract 160 from 220, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 8:
If we divide 600 by 80, we get 7 and a remainder of 40.
The next digit of our result is 7. 
Result so far: 8359.27
Subtracting 560 from 600 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 9:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 8359.275
The remainder is 0 after subtracting 400 from 400.
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 10:
80 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8359.275
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.

On to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 8359.275
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.

Our division results in 8359.275 with a remaining 0.0.