66866560 divided by 354 
Our goal is to divide 66866560 by 354.

Moving on to step 1:
354 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 354

Let's proceed to step 2:
If we divide 66 by 354, we get 0 and a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Fetch the next digit (8) from the dividend, attach it to 66 and continue: 668 / 354

Advancing to step 3:
668 divided by 354 is 1 with a remainder of 314.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 354 away from 668, we end up with 314.
Fetch the next digit (6) from the dividend, attach it to 314 and continue: 3146 / 354

Going ahead to step 4:
354 goes into 3146 8 times with a remainder of 314.
The next digit of our result is 8. 
Result so far: 18.0
Deduct 2832 from 3146 and we're left with 314.
Bring next digit (6) of the dividend behind the 314 and repeat the process: 3146 / 354

Moving on to step 5:
354 can be fit into 3146 8 times, resulting in a remainder of 314.
Record the quotient 8 as the next digit in the result. 
Result so far: 188.0
Deduct 2832 from 3146 and we're left with 314.
Append the next digit (5) from the dividend to 314 and continue with: 3145 / 354

Advancing to step 6:
If we divide 3145 by 354, we get 8 and a remainder of 313.
The number 8 becomes the next digit in our result. 
Result so far: 1888.0
Deduct 2832 from 3145 and we're left with 313.
Fetch the next digit (6) from the dividend, attach it to 313 and continue: 3136 / 354

Advancing to step 7:
354 goes into 3136 8 times with a remainder of 304.
Put 8 as the next digit of the answer. 
Result so far: 18888.0
The remainder is 304 after subtracting 2832 from 3136.
Take the next digit (0) from the dividend and append it to 304, then repeat: 3040 / 354

On to step 8:
354 can be fit into 3040 8 times, resulting in a remainder of 208.
Use 8 as the next digit of our solution. 
Result so far: 188888.0
Subtracting 2832 from 3040 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Going ahead to step 9:
The number 354 fits into 2080 5 times, leaving a remainder of 310.
Write down 5 as next digit of the result. 
Result so far: 188888.5
The remainder is 310 after subtracting 1770 from 2080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Let's proceed to step 10:
When dividing 3100 by 354, we get 8 with a remainder of 268.
The number 8 becomes the next digit in our result. 
Result so far: 188888.58
Deduct 2832 from 3100 and we're left with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Step 11:
The number 354 fits into 2680 7 times, leaving a remainder of 202.
The number 7 becomes the next digit in our result. 
Result so far: 188888.587
Deduct 2478 from 2680 and we're left with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

Advancing to step 12:
2020 divided by 354 is 5 with a remainder of 250.
The next digit of our result is 5. 
Result so far: 188888.5875
If we subtract 1770 from 2020, we get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Going ahead to step 13:
If we divide 2500 by 354, we get 7 and a remainder of 22.
Write down 7 as next digit of the result. 
Result so far: 188888.58757
If we subtract 2478 from 2500, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 14:
If we divide 220 by 354, we get 0 and a remainder of 220.
Record the quotient 0 as the next digit in the result. 
Result so far: 188888.58757
Subtract 0 from 220 to get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 15:
The number 354 fits into 2200 6 times, leaving a remainder of 76.
Record the quotient 6 as the next digit in the result. 
Result so far: 188888.5875706
If we take 2124 away from 2200, we end up 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.

Moving on to step 16:
The number 354 fits into 760 2 times, leaving a remainder of 52.
The next digit of our result is 2. 
Result so far: 188888.58757062
Deduct 708 from 760 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final outcome is 188888.58757062, with a leftover of 5.2e-08.