Let's divide 998689 by 90
We're looking to find how many times 90 goes into 998689.

On to step 1:
90 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 90

Going ahead to step 2:
The number 90 fits into 99 1 times, leaving a remainder of 9.
The next digit of our result is 1. 
Result so far: 1.0
If we take 90 away from 99, we end up with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 90

Let's proceed to step 3:
98 divided by 90 is 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 11.0
If we take 90 away from 98, we end up with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 90

Going ahead to step 4:
The number 90 fits into 86 0 times, leaving a remainder of 86.
The next digit of our result is 0. 
Result so far: 110.0
Deduct 0 from 86 and we're left with 86.
Append the next digit (8) from the dividend to 86 and continue with: 868 / 90

Step 5:
90 goes into 868 9 times with a remainder of 58.
The number 9 becomes the next digit in our result. 
Result so far: 1109.0
Deduct 810 from 868 and we're left with 58.
Take the next digit (9) from the dividend and append it to 58, then repeat: 589 / 90

Let's proceed to step 6:
90 goes into 589 6 times with a remainder of 49.
Put 6 as the next digit of the answer. 
Result so far: 11096.0
If we take 540 away from 589, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 7:
90 can be fit into 490 5 times, resulting in a remainder of 40.
Record the quotient 5 as the next digit in the result. 
Result so far: 11096.5
If we subtract 450 from 490, 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 8:
400 divided by 90 is 4 with a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 11096.54
If we take 360 away from 400, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 9:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 11096.544
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 11096.544 and a remainder of 0.004.