349959 divided by 12 
We want to divide 349959 by 12.

Going ahead to step 1:
3 divided by 12 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 12

Let's proceed to step 2:
12 goes into 34 2 times with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 24 from 34 to get 10.
Grab the next digit (9) from the dividend, add it to 10, then carry on: 109 / 12

Let's proceed to step 3:
The number 12 fits into 109 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
Deduct 108 from 109 and we're left with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 12

Going ahead to step 4:
If we divide 19 by 12, we get 1 and a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 291.0
If we subtract 12 from 19, we get 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 12

Let's proceed to step 5:
12 goes into 75 6 times with a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 2916.0
The remainder is 3 after subtracting 72 from 75.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 12

Advancing to step 6:
When dividing 39 by 12, we get 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 29163.0
Subtracting 36 from 39 leaves us 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 7:
12 can be fit into 30 2 times, resulting in a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 29163.2
Deduct 24 from 30 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
12 can be fit into 60 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 29163.25
The remainder is 0 after subtracting 60 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
12 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 29163.25
Subtract 0 from 0 to 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 10:
12 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 29163.25
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 result is 29163.25 with a remainder of 0.0.