We look at the division of 510858 by 80 
We want to figure out the number of times 510858 can be divided by 80.

Advancing to step 1:
80 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 80

Going ahead to step 2:
The number 80 fits into 51 0 times, leaving a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Bring next digit (0) of the dividend behind the 51 and repeat the process: 510 / 80

Moving on to step 3:
When dividing 510 by 80, we get 6 with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 480 from 510, we get 30.
Bring next digit (8) of the dividend behind the 30 and repeat the process: 308 / 80

Let's proceed to step 4:
If we divide 308 by 80, we get 3 and a remainder of 68.
Write down 3 as next digit of the result. 
Result so far: 63.0
Subtract 240 from 308 to get 68.
Append the next digit (5) from the dividend to 68 and continue with: 685 / 80

Step 5:
The number 80 fits into 685 8 times, leaving a remainder of 45.
Write down 8 as next digit of the result. 
Result so far: 638.0
If we subtract 640 from 685, we get 45.
Bring next digit (8) of the dividend behind the 45 and repeat the process: 458 / 80

Advancing to step 6:
458 divided by 80 is 5 with a remainder of 58.
Put 5 as the next digit of the answer. 
Result so far: 6385.0
Subtracting 400 from 458 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 7:
The number 80 fits into 580 7 times, leaving a remainder of 20.
Record the quotient 7 as the next digit in the result. 
Result so far: 6385.7
If we take 560 away from 580, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
80 goes into 200 2 times with a remainder of 40.
Write down 2 as next digit of the result. 
Result so far: 6385.72
If we take 160 away from 200, we end up 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.

Advancing to step 9:
If we divide 400 by 80, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 6385.725
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.

Advancing to step 10:
When dividing 0 by 80, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 6385.725
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.

Let's proceed 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: 6385.725
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.

Our division results in 6385.725 with a remaining 0.0.