We look at the division of 66875699 by 543 
We're looking to find how many times 543 goes into 66875699.

On to step 1:
543 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 543

Advancing to step 2:
543 goes into 66 0 times with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Fetch the next digit (8) from the dividend, attach it to 66 and continue: 668 / 543

On to step 3:
543 goes into 668 1 times with a remainder of 125.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 543 from 668 and we're left with 125.
Append the next digit (7) from the dividend to 125 and continue with: 1257 / 543

Advancing to step 4:
1257 divided by 543 is 2 with a remainder of 171.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we take 1086 away from 1257, we end up with 171.
Bring next digit (5) of the dividend behind the 171 and repeat the process: 1715 / 543

Moving on to step 5:
543 can be fit into 1715 3 times, resulting in a remainder of 86.
The next digit of our result is 3. 
Result so far: 123.0
The remainder is 86 after subtracting 1629 from 1715.
Bring next digit (6) of the dividend behind the 86 and repeat the process: 866 / 543

Step 6:
543 can be fit into 866 1 times, resulting in a remainder of 323.
Put 1 as the next digit of the answer. 
Result so far: 1231.0
If we take 543 away from 866, we end up with 323.
Fetch the next digit (9) from the dividend, attach it to 323 and continue: 3239 / 543

Moving on to step 7:
When dividing 3239 by 543, we get 5 with a remainder of 524.
Write down 5 as next digit of the result. 
Result so far: 12315.0
Deduct 2715 from 3239 and we're left with 524.
Append the next digit (9) from the dividend to 524 and continue with: 5249 / 543

Step 8:
543 can be fit into 5249 9 times, resulting in a remainder of 362.
Use 9 as the next digit of our solution. 
Result so far: 123159.0
If we subtract 4887 from 5249, we get 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Moving on to step 9:
The number 543 fits into 3620 6 times, leaving a remainder of 362.
The number 6 becomes the next digit in our result. 
Result so far: 123159.6
Deduct 3258 from 3620 and we're left with 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

On to step 10:
If we divide 3620 by 543, we get 6 and a remainder of 362.
Use 6 as the next digit of our solution. 
Result so far: 123159.66
If we take 3258 away from 3620, we end up with 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

The final outcome is 123159.66, with a leftover of 0.362.