We look at the division of 483980 by 12 
Our goal is to divide 483980 by 12.

Step 1:
12 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 12

Going ahead to step 2:
12 goes into 48 4 times with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 48 from 48 and we're left with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 12

Advancing to step 3:
12 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 40.0
Subtract 0 from 3 to get 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 12

Step 4:
39 divided by 12 is 3 with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 403.0
The remainder is 3 after subtracting 36 from 39.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 12

Advancing to step 5:
When dividing 38 by 12, we get 3 with a remainder of 2.
Use 3 as the next digit of our solution. 
Result so far: 4033.0
Deduct 36 from 38 and we're left with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 12

Step 6:
If we divide 20 by 12, we get 1 and a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 40331.0
Subtracting 12 from 20 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.

Let's proceed to step 7:
80 divided by 12 is 6 with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 40331.6
If we take 72 away from 80, we end up 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.

Going ahead to step 8:
The number 12 fits into 80 6 times, leaving a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 40331.66
If we subtract 72 from 80, we 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.

In conclusion, the division gives 40331.66 with a balance of 0.008.