359943 divided by 12 
Our goal is to divide 359943 by 12.

Step 1:
12 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 12

Let's proceed to step 2:
12 can be fit into 35 2 times, resulting in a remainder of 11.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 24 from 35, we get 11.
Include the next digit (9) from the dividend after 11, then repeat: 119 / 12

On to step 3:
The number 12 fits into 119 9 times, leaving a remainder of 11.
The next digit of our result is 9. 
Result so far: 29.0
If we subtract 108 from 119, we get 11.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 12

Let's proceed to step 4:
119 divided by 12 is 9 with a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 299.0
If we subtract 108 from 119, we get 11.
Bring next digit (4) of the dividend behind the 11 and repeat the process: 114 / 12

On to step 5:
114 divided by 12 is 9 with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 2999.0
Subtract 108 from 114 to get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 12

Advancing to step 6:
12 goes into 63 5 times with a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 29995.0
If we take 60 away from 63, we end up 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.

Step 7:
The number 12 fits into 30 2 times, leaving a remainder of 6.
The next digit of our result is 2. 
Result so far: 29995.2
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:
When dividing 60 by 12, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 29995.25
Subtracting 60 from 60 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.

Moving on to step 9:
12 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 29995.25
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.

Going ahead to step 10:
12 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 29995.25
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.

In conclusion, the division gives 29995.25 with a balance of 0.0.