We look at the division of 80039963 by 813 
Let's see how many times 813 fits into 80039963.

Advancing to step 1:
If we divide 8 by 813, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 813

Step 2:
If we divide 80 by 813, we get 0 and a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Grab the next digit (0) from the dividend, add it to 80, then carry on: 800 / 813

Going ahead to step 3:
800 divided by 813 is 0 with a remainder of 800.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 800 after subtracting 0 from 800.
Fetch the next digit (3) from the dividend, attach it to 800 and continue: 8003 / 813

Going ahead to step 4:
813 can be fit into 8003 9 times, resulting in a remainder of 686.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 7317 from 8003 to get 686.
Append the next digit (9) from the dividend to 686 and continue with: 6869 / 813

Step 5:
The number 813 fits into 6869 8 times, leaving a remainder of 365.
Put 8 as the next digit of the answer. 
Result so far: 98.0
The remainder is 365 after subtracting 6504 from 6869.
Take the next digit (9) from the dividend and append it to 365, then repeat: 3659 / 813

On to step 6:
The number 813 fits into 3659 4 times, leaving a remainder of 407.
The number 4 becomes the next digit in our result. 
Result so far: 984.0
Subtract 3252 from 3659 to get 407.
Take the next digit (6) from the dividend and append it to 407, then repeat: 4076 / 813

Let's proceed to step 7:
813 goes into 4076 5 times with a remainder of 11.
The number 5 becomes the next digit in our result. 
Result so far: 9845.0
If we take 4065 away from 4076, we end up with 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 813

Going ahead to step 8:
113 divided by 813 is 0 with a remainder of 113.
Put 0 as the next digit of the answer. 
Result so far: 98450.0
The remainder is 113 after subtracting 0 from 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

Advancing to step 9:
1130 divided by 813 is 1 with a remainder of 317.
The next digit of our result is 1. 
Result so far: 98450.1
If we take 813 away from 1130, we end up with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Going ahead to step 10:
813 can be fit into 3170 3 times, resulting in a remainder of 731.
The next digit of our result is 3. 
Result so far: 98450.13
If we subtract 2439 from 3170, we get 731.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7310, and continue the process.

Advancing to step 11:
When dividing 7310 by 813, we get 8 with a remainder of 806.
The number 8 becomes the next digit in our result. 
Result so far: 98450.138
If we take 6504 away from 7310, we end up with 806.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8060, and continue the process.

Step 12:
The number 813 fits into 8060 9 times, leaving a remainder of 743.
Put 9 as the next digit of the answer. 
Result so far: 98450.1389
If we subtract 7317 from 8060, we get 743.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7430, and continue the process.

Going ahead to step 13:
The number 813 fits into 7430 9 times, leaving a remainder of 113.
The number 9 becomes the next digit in our result. 
Result so far: 98450.13899
Subtracting 7317 from 7430 leaves us with 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

The quotient of the division is 98450.13899, and the remainder is 0.000113.