Let's divide 509846 by 12
Let's see how many times 12 fits into 509846.

Going ahead to step 1:
12 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 12

On to step 2:
50 divided by 12 is 4 with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 48 from 50 leaves us with 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 12

On to step 3:
12 can be fit into 29 2 times, resulting in a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtract 24 from 29 to get 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 12

Step 4:
When dividing 58 by 12, we get 4 with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 424.0
Deduct 48 from 58 and we're left with 10.
Take the next digit (4) from the dividend and append it to 10, then repeat: 104 / 12

On to step 5:
12 goes into 104 8 times with a remainder of 8.
The next digit of our result is 8. 
Result so far: 4248.0
If we take 96 away from 104, we end up with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 12

Let's proceed to step 6:
12 can be fit into 86 7 times, resulting in a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 42487.0
If we take 84 away from 86, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 7:
12 goes into 20 1 times with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 42487.1
The remainder is 8 after subtracting 12 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 8:
The number 12 fits into 80 6 times, leaving a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 42487.16
The remainder is 8 after subtracting 72 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
12 can be fit into 80 6 times, resulting in a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 42487.166
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 42487.166 with a remaining 0.0008.