12188386 ÷ 424 
Our goal is to divide 12188386 by 424.

Going ahead to step 1:
The number 424 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 424

Step 2:
If we divide 12 by 424, we get 0 and a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 424

Step 3:
424 goes into 121 0 times with a remainder of 121.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 121, we end up with 121.
Take the next digit (8) from the dividend and append it to 121, then repeat: 1218 / 424

On to step 4:
424 can be fit into 1218 2 times, resulting in a remainder of 370.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 848 from 1218 to get 370.
Bring next digit (8) of the dividend behind the 370 and repeat the process: 3708 / 424

On to step 5:
424 can be fit into 3708 8 times, resulting in a remainder of 316.
Write down 8 as next digit of the result. 
Result so far: 28.0
Deduct 3392 from 3708 and we're left with 316.
Grab the next digit (3) from the dividend, add it to 316, then carry on: 3163 / 424

Moving on to step 6:
424 goes into 3163 7 times with a remainder of 195.
Put 7 as the next digit of the answer. 
Result so far: 287.0
Deduct 2968 from 3163 and we're left with 195.
Fetch the next digit (8) from the dividend, attach it to 195 and continue: 1958 / 424

Step 7:
When dividing 1958 by 424, we get 4 with a remainder of 262.
The next digit of our result is 4. 
Result so far: 2874.0
If we take 1696 away from 1958, we end up with 262.
Include the next digit (6) from the dividend after 262, then repeat: 2626 / 424

Moving on to step 8:
424 can be fit into 2626 6 times, resulting in a remainder of 82.
Record the quotient 6 as the next digit in the result. 
Result so far: 28746.0
If we subtract 2544 from 2626, we get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 9:
The number 424 fits into 820 1 times, leaving a remainder of 396.
Record the quotient 1 as the next digit in the result. 
Result so far: 28746.1
Subtract 424 from 820 to get 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Going ahead to step 10:
The number 424 fits into 3960 9 times, leaving a remainder of 144.
Use 9 as the next digit of our solution. 
Result so far: 28746.19
If we subtract 3816 from 3960, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Moving on to step 11:
The number 424 fits into 1440 3 times, leaving a remainder of 168.
Put 3 as the next digit of the answer. 
Result so far: 28746.193
Subtract 1272 from 1440 to get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Going ahead to step 12:
1680 divided by 424 is 3 with a remainder of 408.
Write down 3 as next digit of the result. 
Result so far: 28746.1933
Subtracting 1272 from 1680 leaves us with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

The final outcome is 28746.1933, with a leftover of 0.00408.