668558 ÷ 85 
We want to figure out the number of times 668558 can be divided by 85.

Going ahead to step 1:
85 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 85

Step 2:
66 divided by 85 is 0 with 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.
Take the next digit (8) from the dividend and append it to 66, then repeat: 668 / 85

Step 3:
When dividing 668 by 85, we get 7 with a remainder of 73.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 595 from 668 leaves us with 73.
Fetch the next digit (5) from the dividend, attach it to 73 and continue: 735 / 85

Let's proceed to step 4:
85 can be fit into 735 8 times, resulting in a remainder of 55.
Use 8 as the next digit of our solution. 
Result so far: 78.0
If we take 680 away from 735, we end up with 55.
Bring next digit (5) of the dividend behind the 55 and repeat the process: 555 / 85

Going ahead to step 5:
When dividing 555 by 85, we get 6 with a remainder of 45.
Record the quotient 6 as the next digit in the result. 
Result so far: 786.0
Subtract 510 from 555 to get 45.
Append the next digit (8) from the dividend to 45 and continue with: 458 / 85

On to step 6:
The number 85 fits into 458 5 times, leaving a remainder of 33.
Use 5 as the next digit of our solution. 
Result so far: 7865.0
Subtracting 425 from 458 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 7:
The number 85 fits into 330 3 times, leaving a remainder of 75.
Write down 3 as next digit of the result. 
Result so far: 7865.3
Subtract 255 from 330 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 8:
When dividing 750 by 85, we get 8 with a remainder of 70.
Put 8 as the next digit of the answer. 
Result so far: 7865.38
Deduct 680 from 750 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 9:
85 goes into 700 8 times with a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 7865.388
If we subtract 680 from 700, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 7865.388, and the remainder is 0.002.