We look at the division of 378504 by 80 
We want to figure out the number of times 378504 can be divided by 80.

Step 1:
80 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 80

On to step 2:
When dividing 37 by 80, we get 0 with a remainder of 37.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 37 and we're left with 37.
Take the next digit (8) from the dividend and append it to 37, then repeat: 378 / 80

Let's proceed to step 3:
When dividing 378 by 80, we get 4 with a remainder of 58.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 320 from 378 and we're left with 58.
Grab the next digit (5) from the dividend, add it to 58, then carry on: 585 / 80

Going ahead to step 4:
80 can be fit into 585 7 times, resulting in a remainder of 25.
Write down 7 as next digit of the result. 
Result so far: 47.0
If we subtract 560 from 585, we get 25.
Include the next digit (0) from the dividend after 25, then repeat: 250 / 80

Going ahead to step 5:
The number 80 fits into 250 3 times, leaving a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 473.0
Subtracting 240 from 250 leaves us with 10.
Grab the next digit (4) from the dividend, add it to 10, then carry on: 104 / 80

Going ahead to step 6:
104 divided by 80 is 1 with a remainder of 24.
Use 1 as the next digit of our solution. 
Result so far: 4731.0
If we take 80 away from 104, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 7:
If we divide 240 by 80, we get 3 and a remainder of 0.
The next digit of our result is 3. 
Result so far: 4731.3
If we take 240 away from 240, 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.

Moving on to step 8:
If we divide 0 by 80, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4731.3
Subtract 0 from 0 to get 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 9:
If we divide 0 by 80, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 4731.3
Subtracting 0 from 0 leaves us 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.

The final result is 4731.3 with a remainder of 0.0.