We look at the division of 378447 by 12 
We want to divide 378447 by 12.

Step 1:
3 divided by 12 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 12

Going ahead to step 2:
If we divide 37 by 12, we get 3 and a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 36 from 37 leaves us with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 12

Moving on to step 3:
If we divide 18 by 12, we get 1 and a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 31.0
Subtracting 12 from 18 leaves us with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 12

Step 4:
64 divided by 12 is 5 with a remainder of 4.
The number 5 becomes the next digit in our result. 
Result so far: 315.0
If we subtract 60 from 64, we get 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 12

Step 5:
12 goes into 44 3 times with a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 3153.0
If we take 36 away from 44, we end up with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 12

Step 6:
12 goes into 87 7 times with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 31537.0
Deduct 84 from 87 and we're left 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:
12 goes into 30 2 times with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 31537.2
The remainder is 6 after subtracting 24 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
The number 12 fits into 60 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 31537.25
Deduct 60 from 60 and we're left 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.

Going ahead to step 9:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 31537.25
Deduct 0 from 0 and we're left 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.

Advancing to step 10:
12 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 31537.25
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.

In conclusion, the division gives 31537.25 with a balance of 0.0.