Let's divide 458543 by 12
Our goal is to divide 458543 by 12.

On to step 1:
The number 12 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 12

Let's proceed to step 2:
12 can be fit into 45 3 times, resulting in a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 36 from 45 leaves us with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 12

Going ahead to step 3:
12 can be fit into 98 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
The remainder is 2 after subtracting 96 from 98.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 12

Going ahead to step 4:
12 can be fit into 25 2 times, resulting in a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 382.0
If we subtract 24 from 25, we get 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 12

Going ahead to step 5:
The number 12 fits into 14 1 times, leaving a remainder of 2.
The next digit of our result is 1. 
Result so far: 3821.0
Deduct 12 from 14 and we're left with 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 12

Step 6:
12 can be fit into 23 1 times, resulting in a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 38211.0
If we take 12 away from 23, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 7:
If we divide 110 by 12, we get 9 and a remainder of 2.
The next digit of our result is 9. 
Result so far: 38211.9
If we subtract 108 from 110, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 8:
The number 12 fits into 20 1 times, leaving a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 38211.91
Subtracting 12 from 20 leaves us 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.

On to step 9:
When dividing 80 by 12, we get 6 with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 38211.916
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.

Moving on to step 10:
The number 12 fits into 80 6 times, leaving a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 38211.9166
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.

The final outcome is 38211.9166, with a leftover of 8e-05.