124030 ÷ 12 
Our goal is to divide 124030 by 12.

Let's proceed to step 1:
When dividing 1 by 12, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 12

Going ahead to step 2:
12 can be fit into 12 1 times, resulting in a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 12 from 12 leaves us with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 12

Advancing to step 3:
When dividing 4 by 12, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtract 0 from 4 to get 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 12

Step 4:
If we divide 40 by 12, we get 3 and a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 103.0
Subtract 36 from 40 to get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 12

Going ahead to step 5:
The number 12 fits into 43 3 times, leaving a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 1033.0
If we take 36 away from 43, we end up with 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 12

Going ahead to step 6:
12 can be fit into 70 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 10335.0
Deduct 60 from 70 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 7:
When dividing 100 by 12, we get 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 10335.8
Deduct 96 from 100 and we're left 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.

Going ahead to step 8:
12 goes into 40 3 times with a remainder of 4.
The next digit of our result is 3. 
Result so far: 10335.83
Subtract 36 from 40 to 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.

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: 10335.833
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.

The final result is 10335.833 with a remainder of 0.0004.