We're dividing 490102 by 12 
Let's see how many times 12 fits into 490102.

On to step 1:
12 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 12

Advancing to step 2:
If we divide 49 by 12, we get 4 and a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 1 after subtracting 48 from 49.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 12

On to step 3:
The number 12 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
The remainder is 10 after subtracting 0 from 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 12

Going ahead to step 4:
If we divide 101 by 12, we get 8 and a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 408.0
If we take 96 away from 101, we end up with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 12

Moving on to step 5:
When dividing 50 by 12, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 4084.0
If we take 48 away from 50, we end up with 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 12

Moving on to step 6:
The number 12 fits into 22 1 times, leaving a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 40841.0
Subtract 12 from 22 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 7:
The number 12 fits into 100 8 times, leaving a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 40841.8
The remainder is 4 after subtracting 96 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
40 divided by 12 is 3 with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 40841.83
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
40 divided by 12 is 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 40841.833
Subtracting 36 from 40 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 40841.833, with a leftover of 0.0004.