We look at the division of 997721 by 90 
We want to figure out the number of times 997721 can be divided by 90.

Advancing to step 1:
If we divide 9 by 90, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 90

Let's proceed to step 2:
When dividing 99 by 90, we get 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 90 from 99 and we're left with 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 90

Going ahead to step 3:
97 divided by 90 is 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 90 from 97, we get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 90

Let's proceed to step 4:
90 can be fit into 77 0 times, resulting in a remainder of 77.
The next digit of our result is 0. 
Result so far: 110.0
If we subtract 0 from 77, we get 77.
Bring next digit (2) of the dividend behind the 77 and repeat the process: 772 / 90

Moving on to step 5:
90 goes into 772 8 times with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 1108.0
Subtracting 720 from 772 leaves us with 52.
Take the next digit (1) from the dividend and append it to 52, then repeat: 521 / 90

Moving on to step 6:
90 goes into 521 5 times with a remainder of 71.
The number 5 becomes the next digit in our result. 
Result so far: 11085.0
The remainder is 71 after subtracting 450 from 521.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 7:
When dividing 710 by 90, we get 7 with a remainder of 80.
Record the quotient 7 as the next digit in the result. 
Result so far: 11085.7
If we take 630 away from 710, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
90 can be fit into 800 8 times, resulting in a remainder of 80.
Put 8 as the next digit of the answer. 
Result so far: 11085.78
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 9:
90 can be fit into 800 8 times, resulting in a remainder of 80.
Record the quotient 8 as the next digit in the result. 
Result so far: 11085.788
The remainder is 80 after subtracting 720 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final result is 11085.788 with a remainder of 0.008.