We're dividing 397551 by 99 
We're looking to find how many times 99 goes into 397551.

On to step 1:
99 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 99

Advancing to step 2:
99 can be fit into 39 0 times, resulting in a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Take the next digit (7) from the dividend and append it to 39, then repeat: 397 / 99

Going ahead to step 3:
99 can be fit into 397 4 times, resulting in a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 396 away from 397, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 99

On to step 4:
The number 99 fits into 15 0 times, leaving a remainder of 15.
The next digit of our result is 0. 
Result so far: 40.0
Subtract 0 from 15 to get 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 99

Moving on to step 5:
When dividing 155 by 99, we get 1 with a remainder of 56.
Use 1 as the next digit of our solution. 
Result so far: 401.0
Subtract 99 from 155 to get 56.
Include the next digit (1) from the dividend after 56, then repeat: 561 / 99

Moving on to step 6:
99 goes into 561 5 times with a remainder of 66.
Use 5 as the next digit of our solution. 
Result so far: 4015.0
Subtracting 495 from 561 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 7:
The number 99 fits into 660 6 times, leaving a remainder of 66.
The number 6 becomes the next digit in our result. 
Result so far: 4015.6
Subtracting 594 from 660 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 8:
If we divide 660 by 99, we get 6 and a remainder of 66.
The next digit of our result is 6. 
Result so far: 4015.66
If we subtract 594 from 660, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

The final outcome is 4015.66, with a leftover of 0.066.