We look at the division of 452399 by 12 
Let's see how many times 12 fits into 452399.

On to step 1:
4 divided by 12 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 12

Step 2:
12 can be fit into 45 3 times, resulting in a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 36 from 45 leaves us with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 12

Advancing to step 3:
92 divided by 12 is 7 with a remainder of 8.
Write down 7 as next digit of the result. 
Result so far: 37.0
The remainder is 8 after subtracting 84 from 92.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 12

Let's proceed to step 4:
If we divide 83 by 12, we get 6 and a remainder of 11.
Record the quotient 6 as the next digit in the result. 
Result so far: 376.0
Deduct 72 from 83 and we're left with 11.
Include the next digit (9) from the dividend after 11, then repeat: 119 / 12

Moving on to step 5:
119 divided by 12 is 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 3769.0
Deduct 108 from 119 and we're left with 11.
Fetch the next digit (9) from the dividend, attach it to 11 and continue: 119 / 12

On to step 6:
12 goes into 119 9 times with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 37699.0
Deduct 108 from 119 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
The number 12 fits into 110 9 times, leaving a remainder of 2.
The next digit of our result is 9. 
Result so far: 37699.9
If we take 108 away from 110, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 8:
If we divide 20 by 12, we get 1 and a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 37699.91
If we take 12 away from 20, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
12 goes into 80 6 times with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 37699.916
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
The number 12 fits into 80 6 times, leaving a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 37699.9166
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 37699.9166, and the remainder is 8e-05.