We look at the division of 220243 by 12 
We want to figure out the number of times 220243 can be divided by 12.

Step 1:
12 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 12

Going ahead to step 2:
12 goes into 22 1 times with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 12 from 22 to get 10.
Take the next digit (0) from the dividend and append it to 10, then repeat: 100 / 12

On to step 3:
When dividing 100 by 12, we get 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 18.0
Deduct 96 from 100 and we're left with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 12

Going ahead to step 4:
The number 12 fits into 42 3 times, leaving a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 183.0
Subtract 36 from 42 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 12

Let's proceed to step 5:
12 goes into 64 5 times with a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 1835.0
Deduct 60 from 64 and we're left with 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 12

Advancing to step 6:
43 divided by 12 is 3 with a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 18353.0
If we take 36 away from 43, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
The number 12 fits into 70 5 times, leaving a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 18353.5
If we take 60 away from 70, we end up 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 8:
If we divide 100 by 12, we get 8 and a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 18353.58
Subtract 96 from 100 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.

Going ahead to step 9:
When dividing 40 by 12, we get 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 18353.583
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.

Advancing to step 10:
12 goes into 40 3 times with a remainder of 4.
The next digit of our result is 3. 
Result so far: 18353.5833
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 outcome is 18353.5833, with a leftover of 4e-05.