646179 ÷ 80 
We want to figure out the number of times 646179 can be divided by 80.

Step 1:
When dividing 6 by 80, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 80

On to step 2:
80 goes into 64 0 times with a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Take the next digit (6) from the dividend and append it to 64, then repeat: 646 / 80

On to step 3:
The number 80 fits into 646 8 times, leaving a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 8.0
Deduct 640 from 646 and we're left with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 80

Advancing to step 4:
80 can be fit into 61 0 times, resulting in a remainder of 61.
Record the quotient 0 as the next digit in the result. 
Result so far: 80.0
The remainder is 61 after subtracting 0 from 61.
Fetch the next digit (7) from the dividend, attach it to 61 and continue: 617 / 80

Going ahead to step 5:
80 can be fit into 617 7 times, resulting in a remainder of 57.
Use 7 as the next digit of our solution. 
Result so far: 807.0
Deduct 560 from 617 and we're left with 57.
Append the next digit (9) from the dividend to 57 and continue with: 579 / 80

Step 6:
If we divide 579 by 80, we get 7 and a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 8077.0
If we take 560 away from 579, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 7:
190 divided by 80 is 2 with a remainder of 30.
Record the quotient 2 as the next digit in the result. 
Result so far: 8077.2
If we subtract 160 from 190, 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:
80 goes into 300 3 times with a remainder of 60.
The next digit of our result is 3. 
Result so far: 8077.23
If we subtract 240 from 300, 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.

Moving on to step 9:
80 can be fit into 600 7 times, resulting in a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 8077.237
Deduct 560 from 600 and we're left 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 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 8077.2375
The remainder is 0 after subtracting 400 from 400.
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:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 8077.2375
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.

Step 12:
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: 8077.2375
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.

Our division results in 8077.2375 with a remaining 0.0.