120339 divided by 9 
Our goal is to divide 120339 by 9.

Step 1:
When dividing 1 by 9, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 9

Going ahead to step 2:
9 can be fit into 12 1 times, resulting in a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 3 after subtracting 9 from 12.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 9

On to step 3:
The number 9 fits into 30 3 times, leaving a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtract 27 from 30 to get 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 9

On to step 4:
9 goes into 33 3 times with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 133.0
Subtract 27 from 33 to get 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 9

On to step 5:
The number 9 fits into 63 7 times, leaving a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 1337.0
If we subtract 63 from 63, we get 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 9

On to step 6:
9 divided by 9 is 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 13371.0
If we take 9 away from 9, we end up 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.

Moving on to step 7:
9 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 13371.0
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.

Let's proceed to step 8:
9 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 13371.0
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.

Our division results in 13371.0 with a remaining 0.0.