We look at the division of 80191581 by 403 
We're looking to find how many times 403 goes into 80191581.

Going ahead to step 1:
403 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 403

Advancing to step 2:
403 can be fit into 80 0 times, resulting in a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Append the next digit (1) from the dividend to 80 and continue with: 801 / 403

On to step 3:
403 can be fit into 801 1 times, resulting in a remainder of 398.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 403 from 801 to get 398.
Take the next digit (9) from the dividend and append it to 398, then repeat: 3989 / 403

Moving on to step 4:
3989 divided by 403 is 9 with a remainder of 362.
The next digit of our result is 9. 
Result so far: 19.0
The remainder is 362 after subtracting 3627 from 3989.
Bring next digit (1) of the dividend behind the 362 and repeat the process: 3621 / 403

Going ahead to step 5:
403 can be fit into 3621 8 times, resulting in a remainder of 397.
Put 8 as the next digit of the answer. 
Result so far: 198.0
If we take 3224 away from 3621, we end up with 397.
Grab the next digit (5) from the dividend, add it to 397, then carry on: 3975 / 403

Moving on to step 6:
3975 divided by 403 is 9 with a remainder of 348.
Use 9 as the next digit of our solution. 
Result so far: 1989.0
If we take 3627 away from 3975, we end up with 348.
Append the next digit (8) from the dividend to 348 and continue with: 3488 / 403

Going ahead to step 7:
When dividing 3488 by 403, we get 8 with a remainder of 264.
Write down 8 as next digit of the result. 
Result so far: 19898.0
If we take 3224 away from 3488, we end up with 264.
Bring next digit (1) of the dividend behind the 264 and repeat the process: 2641 / 403

On to step 8:
When dividing 2641 by 403, we get 6 with a remainder of 223.
The next digit of our result is 6. 
Result so far: 198986.0
Subtracting 2418 from 2641 leaves us with 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2230, and continue the process.

Let's proceed to step 9:
The number 403 fits into 2230 5 times, leaving a remainder of 215.
Record the quotient 5 as the next digit in the result. 
Result so far: 198986.5
The remainder is 215 after subtracting 2015 from 2230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Let's proceed to step 10:
403 can be fit into 2150 5 times, resulting in a remainder of 135.
The number 5 becomes the next digit in our result. 
Result so far: 198986.55
If we take 2015 away from 2150, we end up with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

After the division, we end up with 198986.55 and a remainder of 0.135.