We're dividing 16616063 by 399 
Our goal is to divide 16616063 by 399.

Advancing to step 1:
When dividing 1 by 399, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 399

Moving on to step 2:
399 can be fit into 16 0 times, resulting in a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Take the next digit (6) from the dividend and append it to 16, then repeat: 166 / 399

Let's proceed to step 3:
399 can be fit into 166 0 times, resulting in a remainder of 166.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 166 leaves us with 166.
Fetch the next digit (1) from the dividend, attach it to 166 and continue: 1661 / 399

Step 4:
The number 399 fits into 1661 4 times, leaving a remainder of 65.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we subtract 1596 from 1661, we get 65.
Grab the next digit (6) from the dividend, add it to 65, then carry on: 656 / 399

Let's proceed to step 5:
If we divide 656 by 399, we get 1 and a remainder of 257.
Write down 1 as next digit of the result. 
Result so far: 41.0
If we subtract 399 from 656, we get 257.
Grab the next digit (0) from the dividend, add it to 257, then carry on: 2570 / 399

Going ahead to step 6:
The number 399 fits into 2570 6 times, leaving a remainder of 176.
Record the quotient 6 as the next digit in the result. 
Result so far: 416.0
Subtract 2394 from 2570 to get 176.
Include the next digit (6) from the dividend after 176, then repeat: 1766 / 399

Let's proceed to step 7:
If we divide 1766 by 399, we get 4 and a remainder of 170.
The next digit of our result is 4. 
Result so far: 4164.0
If we subtract 1596 from 1766, we get 170.
Grab the next digit (3) from the dividend, add it to 170, then carry on: 1703 / 399

Let's proceed to step 8:
399 can be fit into 1703 4 times, resulting in a remainder of 107.
Use 4 as the next digit of our solution. 
Result so far: 41644.0
Deduct 1596 from 1703 and we're left with 107.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1070, and continue the process.

Going ahead to step 9:
When dividing 1070 by 399, we get 2 with a remainder of 272.
The number 2 becomes the next digit in our result. 
Result so far: 41644.2
Subtract 798 from 1070 to get 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Let's proceed to step 10:
2720 divided by 399 is 6 with a remainder of 326.
Write down 6 as next digit of the result. 
Result so far: 41644.26
The remainder is 326 after subtracting 2394 from 2720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

On to step 11:
If we divide 3260 by 399, we get 8 and a remainder of 68.
Record the quotient 8 as the next digit in the result. 
Result so far: 41644.268
Subtract 3192 from 3260 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 12:
The number 399 fits into 680 1 times, leaving a remainder of 281.
Put 1 as the next digit of the answer. 
Result so far: 41644.2681
If we subtract 399 from 680, we get 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Going ahead to step 13:
399 can be fit into 2810 7 times, resulting in a remainder of 17.
The next digit of our result is 7. 
Result so far: 41644.26817
Subtracting 2793 from 2810 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 14:
399 goes into 170 0 times with a remainder of 170.
Put 0 as the next digit of the answer. 
Result so far: 41644.26817
If we take 0 away from 170, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 15:
The number 399 fits into 1700 4 times, leaving a remainder of 104.
Use 4 as the next digit of our solution. 
Result so far: 41644.2681704
If we subtract 1596 from 1700, we get 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 16:
The number 399 fits into 1040 2 times, leaving a remainder of 242.
The next digit of our result is 2. 
Result so far: 41644.26817042
Subtracting 798 from 1040 leaves us with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

The final outcome is 41644.26817042, with a leftover of 2.42e-07.