809963 divided by 80 
We're looking to find how many times 80 goes into 809963.

Going ahead to step 1:
80 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 80

Advancing to step 2:
80 goes into 80 1 times with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 80 from 80, we get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 80

Advancing to step 3:
When dividing 9 by 80, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 80

Going ahead to step 4:
80 goes into 99 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
Subtracting 80 from 99 leaves us with 19.
Fetch the next digit (6) from the dividend, attach it to 19 and continue: 196 / 80

Step 5:
If we divide 196 by 80, we get 2 and a remainder of 36.
Put 2 as the next digit of the answer. 
Result so far: 1012.0
Subtracting 160 from 196 leaves us with 36.
Take the next digit (3) from the dividend and append it to 36, then repeat: 363 / 80

Going ahead to step 6:
80 goes into 363 4 times with a remainder of 43.
Record the quotient 4 as the next digit in the result. 
Result so far: 10124.0
If we subtract 320 from 363, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 7:
If we divide 430 by 80, we get 5 and a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 10124.5
Deduct 400 from 430 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
When dividing 300 by 80, we get 3 with a remainder of 60.
The number 3 becomes the next digit in our result. 
Result so far: 10124.53
If we subtract 240 from 300, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
When dividing 600 by 80, we get 7 with a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 10124.537
If we subtract 560 from 600, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 10124.5375
If we subtract 400 from 400, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10124.5375
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10124.5375
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 10124.5375, and the remainder is 0.0.