We look at the division of 80129210 by 459 
We're looking to find how many times 459 goes into 80129210.

Going ahead to step 1:
The number 459 fits into 8 0 times, leaving 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 / 459

Advancing to step 2:
459 can be fit into 80 0 times, resulting in a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Fetch the next digit (1) from the dividend, attach it to 80 and continue: 801 / 459

Advancing to step 3:
If we divide 801 by 459, we get 1 and a remainder of 342.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 459 from 801 leaves us with 342.
Include the next digit (2) from the dividend after 342, then repeat: 3422 / 459

Advancing to step 4:
459 goes into 3422 7 times with a remainder of 209.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Deduct 3213 from 3422 and we're left with 209.
Take the next digit (9) from the dividend and append it to 209, then repeat: 2099 / 459

Advancing to step 5:
459 can be fit into 2099 4 times, resulting in a remainder of 263.
Use 4 as the next digit of our solution. 
Result so far: 174.0
The remainder is 263 after subtracting 1836 from 2099.
Bring next digit (2) of the dividend behind the 263 and repeat the process: 2632 / 459

Advancing to step 6:
The number 459 fits into 2632 5 times, leaving a remainder of 337.
Use 5 as the next digit of our solution. 
Result so far: 1745.0
Deduct 2295 from 2632 and we're left with 337.
Include the next digit (1) from the dividend after 337, then repeat: 3371 / 459

Moving on to step 7:
If we divide 3371 by 459, we get 7 and a remainder of 158.
Write down 7 as next digit of the result. 
Result so far: 17457.0
If we subtract 3213 from 3371, we get 158.
Include the next digit (0) from the dividend after 158, then repeat: 1580 / 459

Going ahead to step 8:
The number 459 fits into 1580 3 times, leaving a remainder of 203.
Use 3 as the next digit of our solution. 
Result so far: 174573.0
Subtracting 1377 from 1580 leaves us with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

On to step 9:
459 can be fit into 2030 4 times, resulting in a remainder of 194.
The number 4 becomes the next digit in our result. 
Result so far: 174573.4
If we subtract 1836 from 2030, we get 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Advancing to step 10:
459 goes into 1940 4 times with a remainder of 104.
The number 4 becomes the next digit in our result. 
Result so far: 174573.44
Subtracting 1836 from 1940 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

The final result is 174573.44 with a remainder of 0.104.