Let's divide 518643 by 80
We're looking to find how many times 80 goes into 518643.

Step 1:
If we divide 5 by 80, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 80

Advancing to step 2:
If we divide 51 by 80, we get 0 and a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Fetch the next digit (8) from the dividend, attach it to 51 and continue: 518 / 80

Step 3:
518 divided by 80 is 6 with a remainder of 38.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtract 480 from 518 to get 38.
Bring next digit (6) of the dividend behind the 38 and repeat the process: 386 / 80

On to step 4:
386 divided by 80 is 4 with a remainder of 66.
Record the quotient 4 as the next digit in the result. 
Result so far: 64.0
If we subtract 320 from 386, we get 66.
Append the next digit (4) from the dividend to 66 and continue with: 664 / 80

Going ahead to step 5:
664 divided by 80 is 8 with a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 648.0
Deduct 640 from 664 and we're left with 24.
Fetch the next digit (3) from the dividend, attach it to 24 and continue: 243 / 80

Moving on to step 6:
The number 80 fits into 243 3 times, leaving a remainder of 3.
The next digit of our result is 3. 
Result so far: 6483.0
Subtracting 240 from 243 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
The number 80 fits into 30 0 times, leaving a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 6483.0
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
If we divide 300 by 80, we get 3 and a remainder of 60.
Put 3 as the next digit of the answer. 
Result so far: 6483.03
Deduct 240 from 300 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
When dividing 600 by 80, we get 7 with a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 6483.037
Subtracting 560 from 600 leaves us with 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:
When dividing 400 by 80, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 6483.0375
Deduct 400 from 400 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.

On to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6483.0375
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.

Advancing to step 12:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 6483.0375
If we subtract 0 from 0, we 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 6483.0375, with a leftover of 0.0.