We look at the division of 80358821 by 809 
We're looking to find how many times 809 goes into 80358821.

Advancing to step 1:
The number 809 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 809

Moving on to step 2:
When dividing 80 by 809, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Fetch the next digit (3) from the dividend, attach it to 80 and continue: 803 / 809

Moving on to step 3:
If we divide 803 by 809, we get 0 and a remainder of 803.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 803 and we're left with 803.
Bring next digit (5) of the dividend behind the 803 and repeat the process: 8035 / 809

On to step 4:
If we divide 8035 by 809, we get 9 and a remainder of 754.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 7281 from 8035 leaves us with 754.
Append the next digit (8) from the dividend to 754 and continue with: 7548 / 809

Let's proceed to step 5:
809 goes into 7548 9 times with a remainder of 267.
Record the quotient 9 as the next digit in the result. 
Result so far: 99.0
If we subtract 7281 from 7548, we get 267.
Bring next digit (8) of the dividend behind the 267 and repeat the process: 2678 / 809

On to step 6:
If we divide 2678 by 809, we get 3 and a remainder of 251.
The next digit of our result is 3. 
Result so far: 993.0
Deduct 2427 from 2678 and we're left with 251.
Grab the next digit (2) from the dividend, add it to 251, then carry on: 2512 / 809

Step 7:
809 can be fit into 2512 3 times, resulting in a remainder of 85.
The number 3 becomes the next digit in our result. 
Result so far: 9933.0
Deduct 2427 from 2512 and we're left with 85.
Bring next digit (1) of the dividend behind the 85 and repeat the process: 851 / 809

Going ahead to step 8:
When dividing 851 by 809, we get 1 with a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 99331.0
The remainder is 42 after subtracting 809 from 851.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 9:
If we divide 420 by 809, we get 0 and a remainder of 420.
The next digit of our result is 0. 
Result so far: 99331.0
If we subtract 0 from 420, we get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

On to step 10:
If we divide 4200 by 809, we get 5 and a remainder of 155.
Use 5 as the next digit of our solution. 
Result so far: 99331.05
If we subtract 4045 from 4200, we get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Advancing to step 11:
The number 809 fits into 1550 1 times, leaving a remainder of 741.
Write down 1 as next digit of the result. 
Result so far: 99331.051
Subtract 809 from 1550 to get 741.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7410, and continue the process.

Moving on to step 12:
7410 divided by 809 is 9 with a remainder of 129.
Record the quotient 9 as the next digit in the result. 
Result so far: 99331.0519
Subtract 7281 from 7410 to get 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Step 13:
If we divide 1290 by 809, we get 1 and a remainder of 481.
Record the quotient 1 as the next digit in the result. 
Result so far: 99331.05191
Subtract 809 from 1290 to get 481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4810, and continue the process.

On to step 14:
809 goes into 4810 5 times with a remainder of 765.
The number 5 becomes the next digit in our result. 
Result so far: 99331.051915
The remainder is 765 after subtracting 4045 from 4810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7650, and continue the process.

Going ahead to step 15:
When dividing 7650 by 809, we get 9 with a remainder of 369.
Put 9 as the next digit of the answer. 
Result so far: 99331.0519159
The remainder is 369 after subtracting 7281 from 7650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Going ahead to step 16:
3690 divided by 809 is 4 with a remainder of 454.
Record the quotient 4 as the next digit in the result. 
Result so far: 99331.05191594
Subtracting 3236 from 3690 leaves us with 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Our division results in 99331.05191594 with a remaining 4.54e-07.