We're dividing 434490 by 12 
We want to divide 434490 by 12.

On to step 1:
12 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 12

On to step 2:
If we divide 43 by 12, we get 3 and a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 36 from 43 to get 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 12

Step 3:
When dividing 74 by 12, we get 6 with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 36.0
If we take 72 away from 74, we end up with 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 12

Advancing to step 4:
When dividing 24 by 12, we get 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 362.0
If we take 24 away from 24, we end up with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 12

Moving on to step 5:
If we divide 9 by 12, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 3620.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 12

Going ahead to step 6:
The number 12 fits into 90 7 times, leaving a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 36207.0
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
12 goes into 60 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 36207.5
If we subtract 60 from 60, we 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 8:
When dividing 0 by 12, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 36207.5
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.

Moving on to step 9:
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: 36207.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 36207.5 and a remainder of 0.0.