We're dividing 378451 by 66 
We're looking to find how many times 66 goes into 378451.

Advancing to step 1:
If we divide 3 by 66, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 66

Let's proceed to step 2:
The number 66 fits into 37 0 times, leaving a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 37 after subtracting 0 from 37.
Include the next digit (8) from the dividend after 37, then repeat: 378 / 66

Advancing to step 3:
If we divide 378 by 66, we get 5 and a remainder of 48.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 330 from 378 leaves us with 48.
Fetch the next digit (4) from the dividend, attach it to 48 and continue: 484 / 66

Advancing to step 4:
66 goes into 484 7 times with a remainder of 22.
Write down 7 as next digit of the result. 
Result so far: 57.0
If we subtract 462 from 484, we get 22.
Append the next digit (5) from the dividend to 22 and continue with: 225 / 66

Going ahead to step 5:
66 goes into 225 3 times with a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 573.0
Subtracting 198 from 225 leaves us with 27.
Grab the next digit (1) from the dividend, add it to 27, then carry on: 271 / 66

Step 6:
66 can be fit into 271 4 times, resulting in a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 5734.0
If we subtract 264 from 271, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
66 can be fit into 70 1 times, resulting in a remainder of 4.
The next digit of our result is 1. 
Result so far: 5734.1
If we subtract 66 from 70, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
If we divide 40 by 66, we get 0 and a remainder of 40.
The next digit of our result is 0. 
Result so far: 5734.1
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 9:
If we divide 400 by 66, we get 6 and a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 5734.106
Subtracting 396 from 400 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 10:
66 goes into 40 0 times with a remainder of 40.
The next digit of our result is 0. 
Result so far: 5734.106
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 11:
66 can be fit into 400 6 times, resulting in a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 5734.10606
Deduct 396 from 400 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 12:
If we divide 40 by 66, we get 0 and a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 5734.10606
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 13:
When dividing 400 by 66, we get 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 5734.1060606
If we take 396 away from 400, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
If we divide 40 by 66, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 5734.1060606
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 5734.1060606 with a remainder of 4e-08.