543443 divided by 15 
Our goal is to divide 543443 by 15.

Let's proceed to step 1:
If we divide 5 by 15, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 15

Moving on to step 2:
15 can be fit into 54 3 times, resulting in a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 9 after subtracting 45 from 54.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 15

Let's proceed to step 3:
The number 15 fits into 93 6 times, leaving a remainder of 3.
The number 6 becomes the next digit in our result. 
Result so far: 36.0
If we subtract 90 from 93, we get 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 15

On to step 4:
When dividing 34 by 15, we get 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 362.0
The remainder is 4 after subtracting 30 from 34.
Fetch the next digit (4) from the dividend, attach it to 4 and continue: 44 / 15

Step 5:
44 divided by 15 is 2 with a remainder of 14.
The next digit of our result is 2. 
Result so far: 3622.0
The remainder is 14 after subtracting 30 from 44.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 15

Step 6:
When dividing 143 by 15, we get 9 with a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 36229.0
Subtract 135 from 143 to get 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 7:
15 can be fit into 80 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 36229.5
If we subtract 75 from 80, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 8:
50 divided by 15 is 3 with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 36229.53
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 9:
50 divided by 15 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 36229.533
If we subtract 45 from 50, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 36229.533, with a leftover of 0.0005.