We look at the division of 80840520 by 391 
We want to divide 80840520 by 391.

Let's proceed to step 1:
The number 391 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 391

Moving on to step 2:
391 can be fit into 80 0 times, resulting in a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Append the next digit (8) from the dividend to 80 and continue with: 808 / 391

Advancing to step 3:
808 divided by 391 is 2 with a remainder of 26.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 26 after subtracting 782 from 808.
Include the next digit (4) from the dividend after 26, then repeat: 264 / 391

Let's proceed to step 4:
391 can be fit into 264 0 times, resulting in a remainder of 264.
The next digit of our result is 0. 
Result so far: 20.0
The remainder is 264 after subtracting 0 from 264.
Append the next digit (0) from the dividend to 264 and continue with: 2640 / 391

On to step 5:
2640 divided by 391 is 6 with a remainder of 294.
The next digit of our result is 6. 
Result so far: 206.0
The remainder is 294 after subtracting 2346 from 2640.
Grab the next digit (5) from the dividend, add it to 294, then carry on: 2945 / 391

On to step 6:
The number 391 fits into 2945 7 times, leaving a remainder of 208.
Put 7 as the next digit of the answer. 
Result so far: 2067.0
Deduct 2737 from 2945 and we're left with 208.
Bring next digit (2) of the dividend behind the 208 and repeat the process: 2082 / 391

Let's proceed to step 7:
When dividing 2082 by 391, we get 5 with a remainder of 127.
Use 5 as the next digit of our solution. 
Result so far: 20675.0
Deduct 1955 from 2082 and we're left with 127.
Include the next digit (0) from the dividend after 127, then repeat: 1270 / 391

On to step 8:
If we divide 1270 by 391, we get 3 and a remainder of 97.
Put 3 as the next digit of the answer. 
Result so far: 206753.0
Subtract 1173 from 1270 to get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

On to step 9:
391 can be fit into 970 2 times, resulting in a remainder of 188.
Use 2 as the next digit of our solution. 
Result so far: 206753.2
If we take 782 away from 970, we end up with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

On to step 10:
If we divide 1880 by 391, we get 4 and a remainder of 316.
Record the quotient 4 as the next digit in the result. 
Result so far: 206753.24
Subtracting 1564 from 1880 leaves us with 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Moving on to step 11:
391 can be fit into 3160 8 times, resulting in a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 206753.248
If we subtract 3128 from 3160, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 12:
When dividing 320 by 391, we get 0 with a remainder of 320.
Write down 0 as next digit of the result. 
Result so far: 206753.248
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 13:
391 can be fit into 3200 8 times, resulting in a remainder of 72.
Put 8 as the next digit of the answer. 
Result so far: 206753.24808
Subtract 3128 from 3200 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 14:
720 divided by 391 is 1 with a remainder of 329.
The number 1 becomes the next digit in our result. 
Result so far: 206753.248081
If we subtract 391 from 720, we get 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

Going ahead to step 15:
The number 391 fits into 3290 8 times, leaving a remainder of 162.
The next digit of our result is 8. 
Result so far: 206753.2480818
The remainder is 162 after subtracting 3128 from 3290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Let's proceed to step 16:
391 goes into 1620 4 times with a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 206753.24808184
If we subtract 1564 from 1620, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final outcome is 206753.24808184, with a leftover of 5.6e-08.