Let's divide 640798 by 80
We want to divide 640798 by 80.

Going ahead to step 1:
The number 80 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 80

Moving on to step 2:
80 goes into 64 0 times with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Append the next digit (0) from the dividend to 64 and continue with: 640 / 80

Moving on to step 3:
80 can be fit into 640 8 times, resulting in a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 640 from 640 to get 0.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 80

Moving on to step 4:
If we divide 7 by 80, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 80.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 80

Moving on to step 5:
80 goes into 79 0 times with a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 800.0
Deduct 0 from 79 and we're left with 79.
Include the next digit (8) from the dividend after 79, then repeat: 798 / 80

Advancing to step 6:
80 goes into 798 9 times with a remainder of 78.
Record the quotient 9 as the next digit in the result. 
Result so far: 8009.0
If we take 720 away from 798, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 7:
80 can be fit into 780 9 times, resulting in a remainder of 60.
Record the quotient 9 as the next digit in the result. 
Result so far: 8009.9
If we subtract 720 from 780, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 8:
80 can be fit into 600 7 times, resulting in a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 8009.97
If we subtract 560 from 600, 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.

Going ahead to step 9:
The number 80 fits into 400 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 8009.975
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:
0 divided by 80 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 8009.975
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.

Going ahead to step 11:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 8009.975
If we take 0 away from 0, 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.

In conclusion, the division gives 8009.975 with a balance of 0.0.