423539 divided by 12 
We want to divide 423539 by 12.

Step 1:
If we divide 4 by 12, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 12

On to step 2:
12 goes into 42 3 times with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 36 from 42 to get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 12

Step 3:
When dividing 63 by 12, we get 5 with a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 35.0
The remainder is 3 after subtracting 60 from 63.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 12

On to step 4:
35 divided by 12 is 2 with a remainder of 11.
Put 2 as the next digit of the answer. 
Result so far: 352.0
The remainder is 11 after subtracting 24 from 35.
Include the next digit (3) from the dividend after 11, then repeat: 113 / 12

Advancing to step 5:
113 divided by 12 is 9 with a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 3529.0
The remainder is 5 after subtracting 108 from 113.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 12

On to step 6:
If we divide 59 by 12, we get 4 and a remainder of 11.
Use 4 as the next digit of our solution. 
Result so far: 35294.0
Deduct 48 from 59 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.

Let's proceed to step 7:
110 divided by 12 is 9 with a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 35294.9
Subtracting 108 from 110 leaves us 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.

Let's proceed to step 8:
12 goes into 20 1 times with a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 35294.91
The remainder is 8 after subtracting 12 from 20.
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.
Write down 6 as next digit of the result. 
Result so far: 35294.916
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.

On to step 10:
If we divide 80 by 12, we get 6 and a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 35294.9166
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 35294.9166 with a remaining 8e-05.