We look at the division of 80463101 by 399 
We're looking to find how many times 399 goes into 80463101.

On to step 1:
399 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 399

Advancing to step 2:
The number 399 fits into 80 0 times, leaving a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Include the next digit (4) from the dividend after 80, then repeat: 804 / 399

On to step 3:
When dividing 804 by 399, we get 2 with a remainder of 6.
The next digit of our result is 2. 
Result so far: 2.0
If we take 798 away from 804, we end up with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 399

Advancing to step 4:
If we divide 66 by 399, we get 0 and a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
If we take 0 away from 66, we end up with 66.
Take the next digit (3) from the dividend and append it to 66, then repeat: 663 / 399

Going ahead to step 5:
663 divided by 399 is 1 with a remainder of 264.
Record the quotient 1 as the next digit in the result. 
Result so far: 201.0
Subtracting 399 from 663 leaves us with 264.
Bring next digit (1) of the dividend behind the 264 and repeat the process: 2641 / 399

Advancing to step 6:
When dividing 2641 by 399, we get 6 with a remainder of 247.
The next digit of our result is 6. 
Result so far: 2016.0
Deduct 2394 from 2641 and we're left with 247.
Include the next digit (0) from the dividend after 247, then repeat: 2470 / 399

Let's proceed to step 7:
The number 399 fits into 2470 6 times, leaving a remainder of 76.
Use 6 as the next digit of our solution. 
Result so far: 20166.0
Subtracting 2394 from 2470 leaves us with 76.
Grab the next digit (1) from the dividend, add it to 76, then carry on: 761 / 399

Let's proceed to step 8:
If we divide 761 by 399, we get 1 and a remainder of 362.
The next digit of our result is 1. 
Result so far: 201661.0
If we take 399 away from 761, we end up with 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Let's proceed to step 9:
3620 divided by 399 is 9 with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 201661.9
Subtract 3591 from 3620 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 10:
399 goes into 290 0 times with a remainder of 290.
Use 0 as the next digit of our solution. 
Result so far: 201661.9
Subtracting 0 from 290 leaves us with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 11:
399 goes into 2900 7 times with a remainder of 107.
Use 7 as the next digit of our solution. 
Result so far: 201661.907
If we subtract 2793 from 2900, we get 107.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1070, and continue the process.

Moving on to step 12:
The number 399 fits into 1070 2 times, leaving a remainder of 272.
Write down 2 as next digit of the result. 
Result so far: 201661.9072
If we subtract 798 from 1070, we 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.

Moving on to step 13:
The number 399 fits into 2720 6 times, leaving a remainder of 326.
The number 6 becomes the next digit in our result. 
Result so far: 201661.90726
If we take 2394 away from 2720, we end up with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Going ahead to step 14:
399 can be fit into 3260 8 times, resulting in a remainder of 68.
Write down 8 as next digit of the result. 
Result so far: 201661.907268
The remainder is 68 after subtracting 3192 from 3260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 15:
The number 399 fits into 680 1 times, leaving a remainder of 281.
The next digit of our result is 1. 
Result so far: 201661.9072681
Deduct 399 from 680 and we're left with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Let's proceed to step 16:
When dividing 2810 by 399, we get 7 with a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 201661.90726817
Subtract 2793 from 2810 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

After the division, we end up with 201661.90726817 and a remainder of 1.7e-08.