We divide 482103 by 12
Let's see how many times 12 fits into 482103.

On to step 1:
The number 12 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 12

Step 2:
12 can be fit into 48 4 times, resulting in 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 (2) from the dividend, add it to 0, then carry on: 2 / 12

Going ahead to step 3:
2 divided by 12 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 40.0
Subtract 0 from 2 to get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 12

On to step 4:
12 can be fit into 21 1 times, resulting in a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 401.0
If we take 12 away from 21, we end up with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 12

Moving on to step 5:
12 goes into 90 7 times with a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 4017.0
Subtract 84 from 90 to get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 12

On to step 6:
If we divide 63 by 12, we get 5 and a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 40175.0
Subtracting 60 from 63 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
30 divided by 12 is 2 with a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 40175.2
The remainder is 6 after subtracting 24 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
When dividing 60 by 12, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 40175.25
Subtract 60 from 60 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.

On to step 9:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 40175.25
If we take 0 away from 0, we end up 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 10:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 40175.25
If we subtract 0 from 0, 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.

The final outcome is 40175.25, with a leftover of 0.0.