We look at the division of 339830 by 12 
We want to figure out the number of times 339830 can be divided by 12.

Let's proceed to step 1:
If we divide 3 by 12, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (3) from the dividend after 3, then repeat: 33 / 12

Step 2:
The number 12 fits into 33 2 times, leaving a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 24 from 33 and we're left with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 12

Step 3:
99 divided by 12 is 8 with a remainder of 3.
Write down 8 as next digit of the result. 
Result so far: 28.0
If we subtract 96 from 99, we get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 12

Step 4:
When dividing 38 by 12, we get 3 with a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 283.0
Subtracting 36 from 38 leaves us with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 12

Moving on to step 5:
23 divided by 12 is 1 with a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 2831.0
Deduct 12 from 23 and we're left with 11.
Include the next digit (0) from the dividend after 11, then repeat: 110 / 12

Going ahead to step 6:
12 goes into 110 9 times with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 28319.0
If we take 108 away from 110, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
20 divided by 12 is 1 with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 28319.1
Subtracting 12 from 20 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
80 divided by 12 is 6 with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 28319.16
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
The number 12 fits into 80 6 times, leaving a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 28319.166
Subtract 72 from 80 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 28319.166 with a remainder of 0.0008.