487240 ÷ 12 
Let's see how many times 12 fits into 487240.

Going ahead to step 1:
When dividing 4 by 12, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 12

Going ahead to step 2:
48 divided by 12 is 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 48 from 48 and we're left with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 12

Going ahead to step 3:
The number 12 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 40.0
If we take 0 away from 7, we end up with 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 12

Moving on to step 4:
When dividing 72 by 12, we get 6 with a remainder of 0.
The next digit of our result is 6. 
Result so far: 406.0
The remainder is 0 after subtracting 72 from 72.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 12

Let's proceed to step 5:
12 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 4060.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 12

Advancing to step 6:
When dividing 40 by 12, we get 3 with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 40603.0
The remainder is 4 after subtracting 36 from 40.
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 7:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 40603.3
If we subtract 36 from 40, we 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.

Let's proceed to step 8:
When dividing 40 by 12, we get 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 40603.33
If we take 36 away from 40, we end up 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 40603.33, with a leftover of 0.004.