579403 ÷ 80 
We want to figure out the number of times 579403 can be divided by 80.

Step 1:
80 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 80

Let's proceed to step 2:
The number 80 fits into 57 0 times, leaving a remainder of 57.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Take the next digit (9) from the dividend and append it to 57, then repeat: 579 / 80

On to step 3:
579 divided by 80 is 7 with a remainder of 19.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 560 away from 579, we end up with 19.
Grab the next digit (4) from the dividend, add it to 19, then carry on: 194 / 80

Going ahead to step 4:
80 goes into 194 2 times with a remainder of 34.
Write down 2 as next digit of the result. 
Result so far: 72.0
Subtracting 160 from 194 leaves us with 34.
Fetch the next digit (0) from the dividend, attach it to 34 and continue: 340 / 80

On to step 5:
80 goes into 340 4 times with a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 724.0
If we take 320 away from 340, we end up with 20.
Take the next digit (3) from the dividend and append it to 20, then repeat: 203 / 80

Let's proceed to step 6:
203 divided by 80 is 2 with a remainder of 43.
Record the quotient 2 as the next digit in the result. 
Result so far: 7242.0
Subtract 160 from 203 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 7:
The number 80 fits into 430 5 times, leaving a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 7242.5
If we subtract 400 from 430, 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.

Step 8:
If we divide 300 by 80, we get 3 and a remainder of 60.
Write down 3 as next digit of the result. 
Result so far: 7242.53
Subtracting 240 from 300 leaves us 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.

Advancing to step 9:
600 divided by 80 is 7 with a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 7242.537
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.

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: 7242.5375
If we subtract 400 from 400, 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.

Let's proceed to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 7242.5375
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.

Step 12:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 7242.5375
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.

After the division, we end up with 7242.5375 and a remainder of 0.0.