We look at the division of 43639900 by 543 
We want to divide 43639900 by 543.

Advancing to step 1:
When dividing 4 by 543, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 543

Moving on to step 2:
543 can be fit into 43 0 times, resulting in a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Include the next digit (6) from the dividend after 43, then repeat: 436 / 543

Moving on to step 3:
The number 543 fits into 436 0 times, leaving a remainder of 436.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 436 and we're left with 436.
Append the next digit (3) from the dividend to 436 and continue with: 4363 / 543

Advancing to step 4:
When dividing 4363 by 543, we get 8 with a remainder of 19.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Deduct 4344 from 4363 and we're left with 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 543

Step 5:
The number 543 fits into 199 0 times, leaving a remainder of 199.
The next digit of our result is 0. 
Result so far: 80.0
Deduct 0 from 199 and we're left with 199.
Include the next digit (9) from the dividend after 199, then repeat: 1999 / 543

Let's proceed to step 6:
1999 divided by 543 is 3 with a remainder of 370.
Put 3 as the next digit of the answer. 
Result so far: 803.0
The remainder is 370 after subtracting 1629 from 1999.
Take the next digit (0) from the dividend and append it to 370, then repeat: 3700 / 543

Advancing to step 7:
The number 543 fits into 3700 6 times, leaving a remainder of 442.
Record the quotient 6 as the next digit in the result. 
Result so far: 8036.0
If we subtract 3258 from 3700, we get 442.
Grab the next digit (0) from the dividend, add it to 442, then carry on: 4420 / 543

Moving on to step 8:
If we divide 4420 by 543, we get 8 and a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 80368.0
Subtracting 4344 from 4420 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 9:
760 divided by 543 is 1 with a remainder of 217.
Record the quotient 1 as the next digit in the result. 
Result so far: 80368.1
The remainder is 217 after subtracting 543 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

Moving on to step 10:
When dividing 2170 by 543, we get 3 with a remainder of 541.
The next digit of our result is 3. 
Result so far: 80368.13
The remainder is 541 after subtracting 1629 from 2170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5410, and continue the process.

Moving on to step 11:
543 can be fit into 5410 9 times, resulting in a remainder of 523.
Put 9 as the next digit of the answer. 
Result so far: 80368.139
Subtract 4887 from 5410 to get 523.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5230, and continue the process.

Let's proceed to step 12:
The number 543 fits into 5230 9 times, leaving a remainder of 343.
Use 9 as the next digit of our solution. 
Result so far: 80368.1399
Subtract 4887 from 5230 to get 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

The final outcome is 80368.1399, with a leftover of 0.00343.