Let's divide 15975635 by 666
We want to figure out the number of times 15975635 can be divided by 666.

Advancing to step 1:
The number 666 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 666

Step 2:
The number 666 fits into 15 0 times, leaving a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 666

Advancing to step 3:
When dividing 159 by 666, we get 0 with a remainder of 159.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 159, we end up with 159.
Take the next digit (7) from the dividend and append it to 159, then repeat: 1597 / 666

Moving on to step 4:
1597 divided by 666 is 2 with a remainder of 265.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 1332 from 1597 and we're left with 265.
Include the next digit (5) from the dividend after 265, then repeat: 2655 / 666

Moving on to step 5:
2655 divided by 666 is 3 with a remainder of 657.
Put 3 as the next digit of the answer. 
Result so far: 23.0
The remainder is 657 after subtracting 1998 from 2655.
Take the next digit (6) from the dividend and append it to 657, then repeat: 6576 / 666

Moving on to step 6:
6576 divided by 666 is 9 with a remainder of 582.
The number 9 becomes the next digit in our result. 
Result so far: 239.0
Subtracting 5994 from 6576 leaves us with 582.
Include the next digit (3) from the dividend after 582, then repeat: 5823 / 666

Going ahead to step 7:
5823 divided by 666 is 8 with a remainder of 495.
Put 8 as the next digit of the answer. 
Result so far: 2398.0
Deduct 5328 from 5823 and we're left with 495.
Take the next digit (5) from the dividend and append it to 495, then repeat: 4955 / 666

Going ahead to step 8:
If we divide 4955 by 666, we get 7 and a remainder of 293.
The number 7 becomes the next digit in our result. 
Result so far: 23987.0
Deduct 4662 from 4955 and we're left with 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Advancing to step 9:
The number 666 fits into 2930 4 times, leaving a remainder of 266.
The number 4 becomes the next digit in our result. 
Result so far: 23987.4
Subtracting 2664 from 2930 leaves us with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Step 10:
The number 666 fits into 2660 3 times, leaving a remainder of 662.
The number 3 becomes the next digit in our result. 
Result so far: 23987.43
If we subtract 1998 from 2660, we get 662.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6620, and continue the process.

On to step 11:
If we divide 6620 by 666, we get 9 and a remainder of 626.
Write down 9 as next digit of the result. 
Result so far: 23987.439
Subtracting 5994 from 6620 leaves us with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Going ahead to step 12:
6260 divided by 666 is 9 with a remainder of 266.
Put 9 as the next digit of the answer. 
Result so far: 23987.4399
The remainder is 266 after subtracting 5994 from 6260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Our division results in 23987.4399 with a remaining 0.00266.