We divide 9939 by 9
We want to figure out the number of times 9939 can be divided by 9.

Moving on to step 1:
The number 9 fits into 9 1 times, leaving a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 0 after subtracting 9 from 9.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 9

Let's proceed to step 2:
9 divided by 9 is 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we subtract 9 from 9, we get 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 9

Going ahead to step 3:
When dividing 3 by 9, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 110.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 9

On to step 4:
9 goes into 39 4 times with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 1104.0
Deduct 36 from 39 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 5:
9 goes into 30 3 times with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 1104.3
Deduct 27 from 30 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 6:
If we divide 30 by 9, we get 3 and a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 1104.33
If we subtract 27 from 30, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final outcome is 1104.33, with a leftover of 0.003.