586428 ÷ 12 
We want to divide 586428 by 12.

Going ahead to step 1:
12 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 12

Going ahead to step 2:
12 goes into 58 4 times with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 10 after subtracting 48 from 58.
Fetch the next digit (6) from the dividend, attach it to 10 and continue: 106 / 12

Step 3:
When dividing 106 by 12, we get 8 with a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 48.0
Subtract 96 from 106 to get 10.
Fetch the next digit (4) from the dividend, attach it to 10 and continue: 104 / 12

Let's proceed to step 4:
When dividing 104 by 12, we get 8 with a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 488.0
If we subtract 96 from 104, we get 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 12

Let's proceed to step 5:
The number 12 fits into 82 6 times, leaving a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 4886.0
Subtracting 72 from 82 leaves us with 10.
Take the next digit (8) from the dividend and append it to 10, then repeat: 108 / 12

Going ahead to step 6:
The number 12 fits into 108 9 times, leaving a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 48869.0
The remainder is 0 after subtracting 108 from 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
If we divide 0 by 12, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 48869.0
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.

Going ahead to step 8:
0 divided by 12 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 48869.0
Deduct 0 from 0 and we're left 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 48869.0, with a leftover of 0.0.