Let's divide 343920 by 12
Let's see how many times 12 fits into 343920.

Going ahead to step 1:
If we divide 3 by 12, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 12

Let's proceed to step 2:
When dividing 34 by 12, we get 2 with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 24 from 34 leaves us with 10.
Grab the next digit (3) from the dividend, add it to 10, then carry on: 103 / 12

Let's proceed to step 3:
The number 12 fits into 103 8 times, leaving a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
Subtracting 96 from 103 leaves us with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 12

Let's proceed to step 4:
12 can be fit into 79 6 times, resulting in a remainder of 7.
Write down 6 as next digit of the result. 
Result so far: 286.0
Deduct 72 from 79 and we're left with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 12

On to step 5:
72 divided by 12 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 2866.0
If we subtract 72 from 72, we get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 12

Let's proceed to step 6:
The number 12 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 28660.0
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.

On to step 7:
0 divided by 12 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 28660.0
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.

Advancing to step 8:
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: 28660.0
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.

After the division, we end up with 28660.0 and a remainder of 0.0.