We look at the division of 720573 by 9 
We want to figure out the number of times 720573 can be divided by 9.

Going ahead to step 1:
If we divide 7 by 9, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 9

On to step 2:
72 divided by 9 is 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 72 from 72 to get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 9

Advancing to step 3:
The number 9 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 80.0
If we take 0 away from 0, we end up with 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 9

Step 4:
9 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 800.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 9

Advancing to step 5:
The number 9 fits into 57 6 times, leaving a remainder of 3.
The next digit of our result is 6. 
Result so far: 8006.0
If we take 54 away from 57, we end up with 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 9

Moving on to step 6:
If we divide 33 by 9, we get 3 and a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 80063.0
Subtract 27 from 33 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
9 can be fit into 60 6 times, resulting in a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 80063.6
The remainder is 6 after subtracting 54 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
If we divide 60 by 9, we get 6 and a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 80063.66
Subtracting 54 from 60 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

After the division, we end up with 80063.66 and a remainder of 0.006.