66660555 divided by 54 
We want to figure out the number of times 66660555 can be divided by 54.

Let's proceed to step 1:
54 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 54

Step 2:
If we divide 66 by 54, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 12 after subtracting 54 from 66.
Grab the next digit (6) from the dividend, add it to 12, then carry on: 126 / 54

Going ahead to step 3:
If we divide 126 by 54, we get 2 and a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtracting 108 from 126 leaves us with 18.
Fetch the next digit (6) from the dividend, attach it to 18 and continue: 186 / 54

Let's proceed to step 4:
186 divided by 54 is 3 with a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 123.0
If we subtract 162 from 186, we get 24.
Fetch the next digit (0) from the dividend, attach it to 24 and continue: 240 / 54

Going ahead to step 5:
The number 54 fits into 240 4 times, leaving a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 1234.0
If we subtract 216 from 240, we get 24.
Take the next digit (5) from the dividend and append it to 24, then repeat: 245 / 54

Going ahead to step 6:
54 can be fit into 245 4 times, resulting in a remainder of 29.
The next digit of our result is 4. 
Result so far: 12344.0
Subtract 216 from 245 to get 29.
Take the next digit (5) from the dividend and append it to 29, then repeat: 295 / 54

Step 7:
If we divide 295 by 54, we get 5 and a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 123445.0
If we take 270 away from 295, we end up with 25.
Grab the next digit (5) from the dividend, add it to 25, then carry on: 255 / 54

Going ahead to step 8:
54 can be fit into 255 4 times, resulting in a remainder of 39.
Record the quotient 4 as the next digit in the result. 
Result so far: 1234454.0
Subtract 216 from 255 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 9:
54 can be fit into 390 7 times, resulting in a remainder of 12.
The next digit of our result is 7. 
Result so far: 1234454.7
Deduct 378 from 390 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 10:
The number 54 fits into 120 2 times, leaving a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 1234454.72
If we take 108 away from 120, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 11:
120 divided by 54 is 2 with a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 1234454.722
If we take 108 away from 120, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 1234454.722 with a remaining 0.0012.