503484 ÷ 12 
We want to divide 503484 by 12.

Step 1:
5 divided by 12 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 12

Let's proceed to step 2:
When dividing 50 by 12, we get 4 with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 2 after subtracting 48 from 50.
Include the next digit (3) from the dividend after 2, then repeat: 23 / 12

Step 3:
When dividing 23 by 12, we get 1 with a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 41.0
If we subtract 12 from 23, we get 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 12

Let's proceed to step 4:
The number 12 fits into 114 9 times, leaving a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 419.0
Subtract 108 from 114 to get 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 12

Let's proceed to step 5:
68 divided by 12 is 5 with a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 4195.0
If we take 60 away from 68, we end up with 8.
Include the next digit (4) from the dividend after 8, then repeat: 84 / 12

Going ahead to step 6:
12 goes into 84 7 times with a remainder of 0.
Use 7 as the next digit of our solution. 
Result so far: 41957.0
Subtracting 84 from 84 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.

On to step 7:
If we divide 0 by 12, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 41957.0
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.

Let's proceed to step 8:
12 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 41957.0
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.

The final outcome is 41957.0, with a leftover of 0.0.