We're dividing 398274 by 12 
We want to figure out the number of times 398274 can be divided by 12.

Let's proceed to step 1:
When dividing 3 by 12, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 12

Moving on to step 2:
The number 12 fits into 39 3 times, leaving a remainder of 3.
The next digit of our result is 3. 
Result so far: 3.0
If we take 36 away from 39, we end up with 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 12

Let's proceed to step 3:
12 goes into 38 3 times with a remainder of 2.
Write down 3 as next digit of the result. 
Result so far: 33.0
Subtracting 36 from 38 leaves us with 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 12

Going ahead to step 4:
12 can be fit into 22 1 times, resulting in a remainder of 10.
The next digit of our result is 1. 
Result so far: 331.0
Subtract 12 from 22 to get 10.
Bring next digit (7) of the dividend behind the 10 and repeat the process: 107 / 12

Let's proceed to step 5:
12 can be fit into 107 8 times, resulting in a remainder of 11.
The next digit of our result is 8. 
Result so far: 3318.0
If we take 96 away from 107, we end up with 11.
Include the next digit (4) from the dividend after 11, then repeat: 114 / 12

Advancing to step 6:
The number 12 fits into 114 9 times, leaving a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 33189.0
If we subtract 108 from 114, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 7:
60 divided by 12 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 33189.5
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 8:
0 divided by 12 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 33189.5
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.

Let's proceed to step 9:
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: 33189.5
If we take 0 away from 0, we end up 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.

After the division, we end up with 33189.5 and a remainder of 0.0.