454129 ÷ 80 
Our goal is to divide 454129 by 80.

Step 1:
80 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 80

Moving on to step 2:
The number 80 fits into 45 0 times, leaving a remainder of 45.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 45 and we're left with 45.
Append the next digit (4) from the dividend to 45 and continue with: 454 / 80

On to step 3:
When dividing 454 by 80, we get 5 with a remainder of 54.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 400 from 454 and we're left with 54.
Fetch the next digit (1) from the dividend, attach it to 54 and continue: 541 / 80

Let's proceed to step 4:
The number 80 fits into 541 6 times, leaving a remainder of 61.
The next digit of our result is 6. 
Result so far: 56.0
If we subtract 480 from 541, we get 61.
Take the next digit (2) from the dividend and append it to 61, then repeat: 612 / 80

On to step 5:
612 divided by 80 is 7 with a remainder of 52.
Write down 7 as next digit of the result. 
Result so far: 567.0
If we take 560 away from 612, we end up with 52.
Include the next digit (9) from the dividend after 52, then repeat: 529 / 80

Let's proceed to step 6:
80 can be fit into 529 6 times, resulting in a remainder of 49.
The next digit of our result is 6. 
Result so far: 5676.0
If we take 480 away from 529, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 7:
When dividing 490 by 80, we get 6 with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 5676.6
If we subtract 480 from 490, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
If we divide 100 by 80, we get 1 and a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 5676.61
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.

On to step 9:
The number 80 fits into 200 2 times, leaving a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 5676.612
If we subtract 160 from 200, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 5676.6125
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.

Step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 5676.6125
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
0 divided by 80 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5676.6125
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 result is 5676.6125 with a remainder of 0.0.