We're dividing 339864 by 30 
We want to figure out the number of times 339864 can be divided by 30.

Going ahead to step 1:
30 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 30

On to step 2:
If we divide 33 by 30, we get 1 and a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 30 away from 33, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 30

Moving on to step 3:
When dividing 39 by 30, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 30 from 39, we get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 30

Moving on to step 4:
The number 30 fits into 98 3 times, leaving a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 113.0
Subtracting 90 from 98 leaves us with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 30

Let's proceed to step 5:
86 divided by 30 is 2 with a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 1132.0
Subtracting 60 from 86 leaves us with 26.
Include the next digit (4) from the dividend after 26, then repeat: 264 / 30

Step 6:
30 goes into 264 8 times with a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 11328.0
If we subtract 240 from 264, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 7:
When dividing 240 by 30, we get 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 11328.8
The remainder is 0 after subtracting 240 from 240.
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 8:
If we divide 0 by 30, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 11328.8
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.

Step 9:
The number 30 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 11328.8
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.

The final outcome is 11328.8, with a leftover of 0.0.