We're dividing 459612 by 12 
Let's see how many times 12 fits into 459612.

On to step 1:
12 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 12

Step 2:
45 divided by 12 is 3 with a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 36 from 45 leaves us with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 12

On to step 3:
12 can be fit into 99 8 times, resulting in a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 38.0
Subtract 96 from 99 to get 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 12

Moving on to step 4:
36 divided by 12 is 3 with a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 383.0
If we subtract 36 from 36, we get 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 12

Advancing to step 5:
The number 12 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 3830.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 12

Let's proceed to step 6:
12 divided by 12 is 1 with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 38301.0
Subtract 12 from 12 to 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.

Advancing to step 7:
12 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 38301.0
Subtracting 0 from 0 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.

Advancing to step 8:
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: 38301.0
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.

The final outcome is 38301.0, with a leftover of 0.0.