We're dividing 720521 by 80 
Our goal is to divide 720521 by 80.

Step 1:
If we divide 7 by 80, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 80

Going ahead to step 2:
80 can be fit into 72 0 times, resulting in a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Bring next digit (0) of the dividend behind the 72 and repeat the process: 720 / 80

Going ahead to step 3:
The number 80 fits into 720 9 times, leaving a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
The remainder is 0 after subtracting 720 from 720.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 80

Advancing to step 4:
If we divide 5 by 80, we get 0 and a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 90.0
Subtract 0 from 5 to get 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 80

Going ahead to step 5:
The number 80 fits into 52 0 times, leaving a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 900.0
Subtracting 0 from 52 leaves us with 52.
Include the next digit (1) from the dividend after 52, then repeat: 521 / 80

Advancing to step 6:
If we divide 521 by 80, we get 6 and a remainder of 41.
Record the quotient 6 as the next digit in the result. 
Result so far: 9006.0
If we take 480 away from 521, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 7:
If we divide 410 by 80, we get 5 and a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 9006.5
Subtract 400 from 410 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
When dividing 100 by 80, we get 1 with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 9006.51
If we subtract 80 from 100, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
80 can be fit into 200 2 times, resulting in a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 9006.512
If we subtract 160 from 200, 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.

Advancing to step 10:
80 can be fit into 400 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 9006.5125
Subtract 400 from 400 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.

Step 11:
0 divided by 80 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 9006.5125
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.

Advancing to step 12:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 9006.5125
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.

The final outcome is 9006.5125, with a leftover of 0.0.