454436 divided by 12 
Our goal is to divide 454436 by 12.

Going ahead to step 1:
The number 12 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 12

On to step 2:
If we divide 45 by 12, we get 3 and a remainder of 9.
The next digit of our result is 3. 
Result so far: 3.0
If we take 36 away from 45, we end up with 9.
Grab the next digit (4) from the dividend, add it to 9, then carry on: 94 / 12

Going ahead to step 3:
If we divide 94 by 12, we get 7 and a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 37.0
The remainder is 10 after subtracting 84 from 94.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 12

Moving on to step 4:
12 can be fit into 104 8 times, resulting in a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 378.0
The remainder is 8 after subtracting 96 from 104.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 12

Moving on to step 5:
12 can be fit into 83 6 times, resulting in a remainder of 11.
Use 6 as the next digit of our solution. 
Result so far: 3786.0
If we take 72 away from 83, we end up with 11.
Append the next digit (6) from the dividend to 11 and continue with: 116 / 12

Advancing to step 6:
12 can be fit into 116 9 times, resulting in a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 37869.0
Subtract 108 from 116 to get 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 7:
When dividing 80 by 12, we get 6 with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 37869.6
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.

Moving on to step 8:
When dividing 80 by 12, we get 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 37869.66
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.

The final outcome is 37869.66, with a leftover of 0.008.