We're dividing 386661 by 66 
We want to figure out the number of times 386661 can be divided by 66.

Advancing to step 1:
66 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 66

Moving on to step 2:
66 goes into 38 0 times with a remainder of 38.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 38, we end up with 38.
Append the next digit (6) from the dividend to 38 and continue with: 386 / 66

Step 3:
If we divide 386 by 66, we get 5 and a remainder of 56.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Deduct 330 from 386 and we're left with 56.
Append the next digit (6) from the dividend to 56 and continue with: 566 / 66

Going ahead to step 4:
566 divided by 66 is 8 with a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 58.0
Subtract 528 from 566 to get 38.
Append the next digit (6) from the dividend to 38 and continue with: 386 / 66

Step 5:
66 goes into 386 5 times with a remainder of 56.
The next digit of our result is 5. 
Result so far: 585.0
Subtract 330 from 386 to get 56.
Bring next digit (1) of the dividend behind the 56 and repeat the process: 561 / 66

Let's proceed to step 6:
561 divided by 66 is 8 with a remainder of 33.
Use 8 as the next digit of our solution. 
Result so far: 5858.0
Deduct 528 from 561 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 7:
66 goes into 330 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 5858.5
Deduct 330 from 330 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
66 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 5858.5
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
0 divided by 66 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 5858.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 5858.5 with a remaining 0.0.