990986 ÷ 90 
We're looking to find how many times 90 goes into 990986.

On to step 1:
If we divide 9 by 90, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 90

Let's proceed to step 2:
When dividing 99 by 90, we get 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 9 after subtracting 90 from 99.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 90

Going ahead to step 3:
90 divided by 90 is 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 11.0
Subtracting 90 from 90 leaves us with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 90

Going ahead to step 4:
If we divide 9 by 90, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 110.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 90

Step 5:
The number 90 fits into 98 1 times, leaving a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 1101.0
Subtract 90 from 98 to get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 90

Let's proceed to step 6:
When dividing 86 by 90, we get 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 11010.0
Deduct 0 from 86 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

On to step 7:
90 can be fit into 860 9 times, resulting in a remainder of 50.
The number 9 becomes the next digit in our result. 
Result so far: 11010.9
Deduct 810 from 860 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
If we divide 500 by 90, we get 5 and a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 11010.95
Subtract 450 from 500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 9:
90 can be fit into 500 5 times, resulting in a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 11010.955
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

After the division, we end up with 11010.955 and a remainder of 0.005.