We're dividing 3964755 by 999 
We're looking to find how many times 999 goes into 3964755.

Step 1:
When dividing 3 by 999, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 999

Let's proceed to step 2:
When dividing 39 by 999, we get 0 with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Bring next digit (6) of the dividend behind the 39 and repeat the process: 396 / 999

On to step 3:
When dividing 396 by 999, we get 0 with a remainder of 396.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 396, we get 396.
Fetch the next digit (4) from the dividend, attach it to 396 and continue: 3964 / 999

Advancing to step 4:
When dividing 3964 by 999, we get 3 with a remainder of 967.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 2997 from 3964 and we're left with 967.
Append the next digit (7) from the dividend to 967 and continue with: 9677 / 999

Let's proceed to step 5:
9677 divided by 999 is 9 with a remainder of 686.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
If we take 8991 away from 9677, we end up with 686.
Take the next digit (5) from the dividend and append it to 686, then repeat: 6865 / 999

Advancing to step 6:
999 goes into 6865 6 times with a remainder of 871.
The number 6 becomes the next digit in our result. 
Result so far: 396.0
Subtracting 5994 from 6865 leaves us with 871.
Append the next digit (5) from the dividend to 871 and continue with: 8715 / 999

Let's proceed to step 7:
8715 divided by 999 is 8 with a remainder of 723.
Use 8 as the next digit of our solution. 
Result so far: 3968.0
Subtract 7992 from 8715 to get 723.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7230, and continue the process.

Moving on to step 8:
If we divide 7230 by 999, we get 7 and a remainder of 237.
Use 7 as the next digit of our solution. 
Result so far: 3968.7
The remainder is 237 after subtracting 6993 from 7230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Let's proceed to step 9:
2370 divided by 999 is 2 with a remainder of 372.
The next digit of our result is 2. 
Result so far: 3968.72
Deduct 1998 from 2370 and we're left with 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Going ahead to step 10:
If we divide 3720 by 999, we get 3 and a remainder of 723.
Write down 3 as next digit of the result. 
Result so far: 3968.723
If we take 2997 away from 3720, we end up with 723.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7230, and continue the process.

Step 11:
If we divide 7230 by 999, we get 7 and a remainder of 237.
Put 7 as the next digit of the answer. 
Result so far: 3968.7237
If we subtract 6993 from 7230, we get 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Advancing to step 12:
999 goes into 2370 2 times with a remainder of 372.
Write down 2 as next digit of the result. 
Result so far: 3968.72372
The remainder is 372 after subtracting 1998 from 2370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Step 13:
The number 999 fits into 3720 3 times, leaving a remainder of 723.
Use 3 as the next digit of our solution. 
Result so far: 3968.723723
Deduct 2997 from 3720 and we're left with 723.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7230, and continue the process.

Let's proceed to step 14:
7230 divided by 999 is 7 with a remainder of 237.
The next digit of our result is 7. 
Result so far: 3968.7237237
Subtracting 6993 from 7230 leaves us with 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Advancing to step 15:
2370 divided by 999 is 2 with a remainder of 372.
The next digit of our result is 2. 
Result so far: 3968.72372372
Deduct 1998 from 2370 and we're left with 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

The final outcome is 3968.72372372, with a leftover of 3.72e-07.