We look at the division of 839821 by 80 
We want to figure out the number of times 839821 can be divided by 80.

Moving on to step 1:
If we divide 8 by 80, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 80

On to step 2:
The number 80 fits into 83 1 times, leaving a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 80 away from 83, we end up with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 80

Moving on to step 3:
80 goes into 39 0 times with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
If we subtract 0 from 39, we get 39.
Append the next digit (8) from the dividend to 39 and continue with: 398 / 80

Advancing to step 4:
80 can be fit into 398 4 times, resulting in a remainder of 78.
The next digit of our result is 4. 
Result so far: 104.0
Deduct 320 from 398 and we're left with 78.
Bring next digit (2) of the dividend behind the 78 and repeat the process: 782 / 80

Moving on to step 5:
80 goes into 782 9 times with a remainder of 62.
Record the quotient 9 as the next digit in the result. 
Result so far: 1049.0
Subtract 720 from 782 to get 62.
Include the next digit (1) from the dividend after 62, then repeat: 621 / 80

Advancing to step 6:
If we divide 621 by 80, we get 7 and a remainder of 61.
Use 7 as the next digit of our solution. 
Result so far: 10497.0
If we take 560 away from 621, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 7:
When dividing 610 by 80, we get 7 with a remainder of 50.
The number 7 becomes the next digit in our result. 
Result so far: 10497.7
If we subtract 560 from 610, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 8:
The number 80 fits into 500 6 times, leaving a remainder of 20.
The next digit of our result is 6. 
Result so far: 10497.76
Subtract 480 from 500 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
80 can be fit into 200 2 times, resulting in a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 10497.762
Deduct 160 from 200 and we're left with 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: 10497.7625
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:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10497.7625
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.

Step 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10497.7625
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.

After the division, we end up with 10497.7625 and a remainder of 0.0.