We're dividing 487039 by 12 
Let's see how many times 12 fits into 487039.

On to step 1:
4 divided by 12 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 12

Moving on 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.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 12

Step 3:
12 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 40.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 12

Let's proceed to step 4:
70 divided by 12 is 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 405.0
Subtract 60 from 70 to get 10.
Bring next digit (3) of the dividend behind the 10 and repeat the process: 103 / 12

On to step 5:
If we divide 103 by 12, we get 8 and a remainder of 7.
The next digit of our result is 8. 
Result so far: 4058.0
If we subtract 96 from 103, we get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 12

Advancing to step 6:
12 goes into 79 6 times with a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 40586.0
The remainder is 7 after subtracting 72 from 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
12 can be fit into 70 5 times, resulting in a remainder of 10.
The next digit of our result is 5. 
Result so far: 40586.5
The remainder is 10 after subtracting 60 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
100 divided by 12 is 8 with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 40586.58
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.

Moving on to step 9:
The number 12 fits into 40 3 times, leaving a remainder of 4.
The next digit of our result is 3. 
Result so far: 40586.583
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.

Advancing to step 10:
12 goes into 40 3 times with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 40586.5833
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.

Our division results in 40586.5833 with a remaining 4e-05.