We're dividing 543851 by 66 
We want to figure out the number of times 543851 can be divided by 66.

Step 1:
66 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 66

Going ahead to step 2:
54 divided by 66 is 0 with a remainder of 54.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 54 leaves us with 54.
Grab the next digit (3) from the dividend, add it to 54, then carry on: 543 / 66

Going ahead to step 3:
66 goes into 543 8 times with a remainder of 15.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 15 after subtracting 528 from 543.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 66

Moving on to step 4:
When dividing 158 by 66, we get 2 with a remainder of 26.
The next digit of our result is 2. 
Result so far: 82.0
Subtracting 132 from 158 leaves us with 26.
Include the next digit (5) from the dividend after 26, then repeat: 265 / 66

Step 5:
66 goes into 265 4 times with a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 824.0
Subtracting 264 from 265 leaves us with 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 66

Going ahead to step 6:
66 can be fit into 11 0 times, resulting in a remainder of 11.
The number 0 becomes the next digit in our result. 
Result so far: 8240.0
If we take 0 away from 11, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
If we divide 110 by 66, we get 1 and a remainder of 44.
Use 1 as the next digit of our solution. 
Result so far: 8240.1
Subtract 66 from 110 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 8:
440 divided by 66 is 6 with a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 8240.16
If we subtract 396 from 440, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
The number 66 fits into 440 6 times, leaving a remainder of 44.
The next digit of our result is 6. 
Result so far: 8240.166
Deduct 396 from 440 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The quotient of the division is 8240.166, and the remainder is 0.0044.