We divide 839641 by 80
Let's see how many times 80 fits into 839641.

Moving on to step 1:
The number 80 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 80

Moving on to step 2:
When dividing 83 by 80, we get 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 80 away from 83, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 80

Step 3:
The number 80 fits into 39 0 times, leaving a remainder of 39.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 39, we end up with 39.
Grab the next digit (6) from the dividend, add it to 39, then carry on: 396 / 80

Step 4:
80 goes into 396 4 times with a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 104.0
The remainder is 76 after subtracting 320 from 396.
Fetch the next digit (4) from the dividend, attach it to 76 and continue: 764 / 80

Step 5:
80 can be fit into 764 9 times, resulting in a remainder of 44.
Write down 9 as next digit of the result. 
Result so far: 1049.0
The remainder is 44 after subtracting 720 from 764.
Include the next digit (1) from the dividend after 44, then repeat: 441 / 80

On to step 6:
If we divide 441 by 80, we get 5 and a remainder of 41.
The next digit of our result is 5. 
Result so far: 10495.0
If we take 400 away from 441, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 7:
410 divided by 80 is 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 10495.5
The remainder is 10 after subtracting 400 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
When dividing 100 by 80, we get 1 with a remainder of 20.
The next digit of our result is 1. 
Result so far: 10495.51
Subtract 80 from 100 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.

Advancing to step 9:
If we divide 200 by 80, we get 2 and a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 10495.512
Subtracting 160 from 200 leaves us 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:
80 goes into 400 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 10495.5125
Subtract 400 from 400 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.

Moving on to step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 10495.5125
Subtracting 0 from 0 leaves us 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.

Step 12:
If we divide 0 by 80, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10495.5125
Subtracting 0 from 0 leaves us 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 final outcome is 10495.5125, with a leftover of 0.0.