340960 ÷ 12 
Let's see how many times 12 fits into 340960.

Going ahead to step 1:
If we divide 3 by 12, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 12

Step 2:
34 divided by 12 is 2 with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 24 from 34 and we're left with 10.
Include the next digit (0) from the dividend after 10, then repeat: 100 / 12

Let's proceed to step 3:
When dividing 100 by 12, we get 8 with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
Deduct 96 from 100 and we're left with 4.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 12

On to step 4:
49 divided by 12 is 4 with a remainder of 1.
The next digit of our result is 4. 
Result so far: 284.0
The remainder is 1 after subtracting 48 from 49.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 12

Let's proceed to step 5:
If we divide 16 by 12, we get 1 and a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 2841.0
Subtract 12 from 16 to get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 12

Moving on to step 6:
40 divided by 12 is 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 28413.0
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
12 goes into 40 3 times with a remainder of 4.
The next digit of our result is 3. 
Result so far: 28413.3
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
12 goes into 40 3 times with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 28413.33
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 28413.33 with a remainder of 0.004.