398149 ÷ 12 
We're looking to find how many times 12 goes into 398149.

Moving on to step 1:
The number 12 fits into 3 0 times, leaving 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.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 12

Step 2:
12 can be fit into 39 3 times, resulting in a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 36 from 39 to get 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 12

Advancing to step 3:
When dividing 38 by 12, we get 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 33.0
If we take 36 away from 38, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 12

Let's proceed to step 4:
12 can be fit into 21 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 331.0
Subtract 12 from 21 to get 9.
Grab the next digit (4) from the dividend, add it to 9, then carry on: 94 / 12

Advancing to step 5:
12 can be fit into 94 7 times, resulting in a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 3317.0
If we subtract 84 from 94, we get 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 12

On to step 6:
The number 12 fits into 109 9 times, leaving a remainder of 1.
The next digit of our result is 9. 
Result so far: 33179.0
The remainder is 1 after subtracting 108 from 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
10 divided by 12 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 33179.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
12 goes into 100 8 times with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 33179.08
The remainder is 4 after subtracting 96 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
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: 33179.083
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.

Step 10:
12 can be fit into 40 3 times, resulting in a remainder of 4.
The next digit of our result is 3. 
Result so far: 33179.0833
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 33179.0833 and a remainder of 4e-05.