518221 ÷ 80 
Our goal is to divide 518221 by 80.

On to step 1:
If we divide 5 by 80, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 80

Let's proceed to step 2:
80 can be fit into 51 0 times, resulting in a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Take the next digit (8) from the dividend and append it to 51, then repeat: 518 / 80

Moving on to step 3:
The number 80 fits into 518 6 times, leaving a remainder of 38.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 480 from 518 and we're left with 38.
Include the next digit (2) from the dividend after 38, then repeat: 382 / 80

Going ahead to step 4:
382 divided by 80 is 4 with a remainder of 62.
Put 4 as the next digit of the answer. 
Result so far: 64.0
Deduct 320 from 382 and we're left with 62.
Bring next digit (2) of the dividend behind the 62 and repeat the process: 622 / 80

Advancing to step 5:
The number 80 fits into 622 7 times, leaving a remainder of 62.
Record the quotient 7 as the next digit in the result. 
Result so far: 647.0
Subtract 560 from 622 to get 62.
Include the next digit (1) from the dividend after 62, then repeat: 621 / 80

On to step 6:
80 can be fit into 621 7 times, resulting in a remainder of 61.
Record the quotient 7 as the next digit in the result. 
Result so far: 6477.0
Subtracting 560 from 621 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 7:
When dividing 610 by 80, we get 7 with a remainder of 50.
Put 7 as the next digit of the answer. 
Result so far: 6477.7
If we take 560 away from 610, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
80 goes into 500 6 times with a remainder of 20.
The next digit of our result is 6. 
Result so far: 6477.76
The remainder is 20 after subtracting 480 from 500.
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.
The number 2 becomes the next digit in our result. 
Result so far: 6477.762
Subtract 160 from 200 to 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.

Let's proceed to step 10:
80 goes into 400 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 6477.7625
If we take 400 away from 400, we end up 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.

Moving on to step 11:
0 divided by 80 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6477.7625
Deduct 0 from 0 and we're left 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.

Advancing to step 12:
80 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 6477.7625
Subtract 0 from 0 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.

The final outcome is 6477.7625, with a leftover of 0.0.