We look at the division of 668531 by 1 
We want to figure out the number of times 668531 can be divided by 1.

Moving on to step 1:
6 divided by 1 is 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we take 6 away from 6, we end up with 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 1

On to step 2:
If we divide 6 by 1, we get 6 and a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 66.0
Deduct 6 from 6 and we're left with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 1

Moving on to step 3:
1 goes into 8 8 times with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 668.0
Deduct 8 from 8 and we're left with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 1

On to step 4:
When dividing 5 by 1, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6685.0
Deduct 5 from 5 and we're left with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 1

Advancing to step 5:
The number 1 fits into 3 3 times, leaving a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 66853.0
Subtract 3 from 3 to get 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 1

Moving on to step 6:
When dividing 1 by 1, we get 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 668531.0
Subtracting 1 from 1 leaves us 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.

Moving on to step 7:
When dividing 0 by 1, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 668531.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
1 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 668531.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 668531.0 and a remainder of 0.0.