378663 divided by 66 
Our goal is to divide 378663 by 66.

Step 1:
If we divide 3 by 66, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 66

Advancing to step 2:
The number 66 fits into 37 0 times, leaving a remainder of 37.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 37 and we're left with 37.
Append the next digit (8) from the dividend to 37 and continue with: 378 / 66

Let's proceed to step 3:
66 goes into 378 5 times with a remainder of 48.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 330 from 378 to get 48.
Take the next digit (6) from the dividend and append it to 48, then repeat: 486 / 66

Going ahead to step 4:
66 goes into 486 7 times with a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 57.0
The remainder is 24 after subtracting 462 from 486.
Append the next digit (6) from the dividend to 24 and continue with: 246 / 66

On to step 5:
If we divide 246 by 66, we get 3 and a remainder of 48.
The number 3 becomes the next digit in our result. 
Result so far: 573.0
If we subtract 198 from 246, we get 48.
Grab the next digit (3) from the dividend, add it to 48, then carry on: 483 / 66

On to step 6:
The number 66 fits into 483 7 times, leaving a remainder of 21.
The number 7 becomes the next digit in our result. 
Result so far: 5737.0
Subtract 462 from 483 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 7:
66 goes into 210 3 times with a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 5737.3
Subtracting 198 from 210 leaves us 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 8:
The number 66 fits into 120 1 times, leaving a remainder of 54.
The next digit of our result is 1. 
Result so far: 5737.31
Deduct 66 from 120 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 9:
540 divided by 66 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 5737.318
The remainder is 12 after subtracting 528 from 540.
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 10:
120 divided by 66 is 1 with a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 5737.3181
Subtract 66 from 120 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 11:
66 can be fit into 540 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 5737.31818
Deduct 528 from 540 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 12:
66 goes into 120 1 times with a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 5737.318181
If we subtract 66 from 120, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 13:
66 can be fit into 540 8 times, resulting in a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 5737.3181818
If we take 528 away from 540, 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.

Let's proceed to step 14:
If we divide 120 by 66, we get 1 and a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 5737.31818181
Deduct 66 from 120 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final result is 5737.31818181 with a remainder of 5.4e-08.