991598 ÷ 1 
Our goal is to divide 991598 by 1.

Advancing to step 1:
If we divide 9 by 1, we get 9 and a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtracting 9 from 9 leaves us with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 1

Going ahead to step 2:
1 goes into 9 9 times with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 99.0
The remainder is 0 after subtracting 9 from 9.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 1

Let's proceed to step 3:
If we divide 1 by 1, we get 1 and a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 991.0
Subtract 1 from 1 to get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 1

Step 4:
1 goes into 5 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 9915.0
Deduct 5 from 5 and we're left with 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 1

Moving on to step 5:
1 goes into 9 9 times with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 99159.0
Deduct 9 from 9 and we're left with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 1

Advancing to step 6:
If we divide 8 by 1, we get 8 and a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 991598.0
The remainder is 0 after subtracting 8 from 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
If we divide 0 by 1, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 991598.0
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 8:
1 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 991598.0
If we subtract 0 from 0, we 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.

In conclusion, the division gives 991598.0 with a balance of 0.0.