We're dividing 664595 by 80 
Let's see how many times 80 fits into 664595.

Advancing to step 1:
6 divided by 80 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 80

Step 2:
If we divide 66 by 80, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Fetch the next digit (4) from the dividend, attach it to 66 and continue: 664 / 80

Step 3:
If we divide 664 by 80, we get 8 and a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 640 from 664 leaves us with 24.
Include the next digit (5) from the dividend after 24, then repeat: 245 / 80

On to step 4:
245 divided by 80 is 3 with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
Subtracting 240 from 245 leaves us with 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 80

Going ahead to step 5:
80 goes into 59 0 times with a remainder of 59.
The number 0 becomes the next digit in our result. 
Result so far: 830.0
If we subtract 0 from 59, we get 59.
Take the next digit (5) from the dividend and append it to 59, then repeat: 595 / 80

Going ahead to step 6:
80 can be fit into 595 7 times, resulting in a remainder of 35.
Record the quotient 7 as the next digit in the result. 
Result so far: 8307.0
If we take 560 away from 595, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 7:
When dividing 350 by 80, we get 4 with a remainder of 30.
The number 4 becomes the next digit in our result. 
Result so far: 8307.4
If we take 320 away from 350, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed 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: 8307.43
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.

Step 9:
80 goes into 600 7 times with a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 8307.437
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.

On to step 10:
The number 80 fits into 400 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 8307.4375
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.

On to step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 8307.4375
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.

Going ahead to step 12:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8307.4375
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.

The final result is 8307.4375 with a remainder of 0.0.