We're dividing 543815 by 66 
We want to divide 543815 by 66.

Advancing to step 1:
When dividing 5 by 66, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 66

Advancing to step 2:
66 can be fit into 54 0 times, resulting in a remainder of 54.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 54 after subtracting 0 from 54.
Grab the next digit (3) from the dividend, add it to 54, then carry on: 543 / 66

Going ahead to step 3:
The number 66 fits into 543 8 times, leaving a remainder of 15.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 528 from 543 leaves us with 15.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 66

Moving on to step 4:
158 divided by 66 is 2 with a remainder of 26.
Put 2 as the next digit of the answer. 
Result so far: 82.0
The remainder is 26 after subtracting 132 from 158.
Bring next digit (1) of the dividend behind the 26 and repeat the process: 261 / 66

On to step 5:
261 divided by 66 is 3 with a remainder of 63.
Record the quotient 3 as the next digit in the result. 
Result so far: 823.0
Subtract 198 from 261 to get 63.
Append the next digit (5) from the dividend to 63 and continue with: 635 / 66

Going ahead to step 6:
The number 66 fits into 635 9 times, leaving a remainder of 41.
The next digit of our result is 9. 
Result so far: 8239.0
If we take 594 away from 635, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 7:
66 can be fit into 410 6 times, resulting in a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 8239.6
Subtract 396 from 410 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
The number 66 fits into 140 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 8239.62
If we take 132 away from 140, 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.

On to step 9:
The number 66 fits into 80 1 times, leaving a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 8239.621
Deduct 66 from 80 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 10:
140 divided by 66 is 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 8239.6212
The remainder is 8 after subtracting 132 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 11:
When dividing 80 by 66, we get 1 with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 8239.62121
If we subtract 66 from 80, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 12:
If we divide 140 by 66, we get 2 and a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 8239.621212
The remainder is 8 after subtracting 132 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 13:
The number 66 fits into 80 1 times, leaving a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 8239.6212121
The remainder is 14 after subtracting 66 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 14:
66 goes into 140 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 8239.62121212
The remainder is 8 after subtracting 132 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 8239.62121212 with a balance of 8e-09.