We look at the division of 6489581 by 666 
We want to figure out the number of times 6489581 can be divided by 666.

Let's proceed to step 1:
If we divide 6 by 666, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 666

On to step 2:
666 can be fit into 64 0 times, resulting in a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Take the next digit (8) from the dividend and append it to 64, then repeat: 648 / 666

On to step 3:
When dividing 648 by 666, we get 0 with a remainder of 648.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 648 to get 648.
Take the next digit (9) from the dividend and append it to 648, then repeat: 6489 / 666

Let's proceed to step 4:
When dividing 6489 by 666, we get 9 with a remainder of 495.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 5994 from 6489 to get 495.
Bring next digit (5) of the dividend behind the 495 and repeat the process: 4955 / 666

Advancing to step 5:
When dividing 4955 by 666, we get 7 with a remainder of 293.
Write down 7 as next digit of the result. 
Result so far: 97.0
Deduct 4662 from 4955 and we're left with 293.
Append the next digit (8) from the dividend to 293 and continue with: 2938 / 666

Step 6:
The number 666 fits into 2938 4 times, leaving a remainder of 274.
The next digit of our result is 4. 
Result so far: 974.0
Deduct 2664 from 2938 and we're left with 274.
Fetch the next digit (1) from the dividend, attach it to 274 and continue: 2741 / 666

On to step 7:
666 can be fit into 2741 4 times, resulting in a remainder of 77.
Record the quotient 4 as the next digit in the result. 
Result so far: 9744.0
Subtracting 2664 from 2741 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

On to step 8:
770 divided by 666 is 1 with a remainder of 104.
The number 1 becomes the next digit in our result. 
Result so far: 9744.1
Subtracting 666 from 770 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

On to step 9:
The number 666 fits into 1040 1 times, leaving a remainder of 374.
The number 1 becomes the next digit in our result. 
Result so far: 9744.11
If we subtract 666 from 1040, we get 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

After the division, we end up with 9744.11 and a remainder of 0.374.