We look at the division of 586948 by 12 
Let's see how many times 12 fits into 586948.

On to step 1:
If we divide 5 by 12, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 12

Going ahead to step 2:
12 can be fit into 58 4 times, resulting in a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 48 from 58, we get 10.
Fetch the next digit (6) from the dividend, attach it to 10 and continue: 106 / 12

Step 3:
If we divide 106 by 12, we get 8 and a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 48.0
Deduct 96 from 106 and we're left with 10.
Grab the next digit (9) from the dividend, add it to 10, then carry on: 109 / 12

Going ahead to step 4:
12 goes into 109 9 times with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 489.0
If we subtract 108 from 109, we get 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 12

Let's proceed to step 5:
12 goes into 14 1 times with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 4891.0
Subtracting 12 from 14 leaves us with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 12

On to step 6:
28 divided by 12 is 2 with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 48912.0
Subtracting 24 from 28 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.

Moving on to step 7:
If we divide 40 by 12, we get 3 and a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 48912.3
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.

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: 48912.33
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.

The final outcome is 48912.33, with a leftover of 0.004.