We're dividing 243288 by 20 
We want to figure out the number of times 243288 can be divided by 20.

Advancing to step 1:
If we divide 2 by 20, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 20

Moving on to step 2:
If we divide 24 by 20, we get 1 and a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 20 from 24 and we're left with 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 20

Moving on to step 3:
When dividing 43 by 20, we get 2 with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Deduct 40 from 43 and we're left with 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 20

Moving on to step 4:
20 goes into 32 1 times with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 121.0
The remainder is 12 after subtracting 20 from 32.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 20

Step 5:
The number 20 fits into 128 6 times, leaving a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 1216.0
The remainder is 8 after subtracting 120 from 128.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 20

Going ahead to step 6:
88 divided by 20 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 12164.0
If we take 80 away from 88, 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.

Advancing to step 7:
80 divided by 20 is 4 with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 12164.4
Subtract 80 from 80 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
When dividing 0 by 20, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 12164.4
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 12164.4
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 12164.4 with a remainder of 0.0.