We look at the division of 855378 by 15 
We're looking to find how many times 15 goes into 855378.

On to step 1:
15 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 15

Going ahead to step 2:
15 goes into 85 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 75 from 85 and we're left with 10.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 15

Going ahead to step 3:
When dividing 105 by 15, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 57.0
The remainder is 0 after subtracting 105 from 105.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 15

Going ahead to step 4:
15 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 570.0
If we subtract 0 from 3, we get 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 15

Let's proceed to step 5:
37 divided by 15 is 2 with a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 5702.0
If we subtract 30 from 37, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 15

Advancing to step 6:
15 can be fit into 78 5 times, resulting in a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 57025.0
If we take 75 away from 78, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
30 divided by 15 is 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 57025.2
If we subtract 30 from 30, we 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.

Let's proceed to step 8:
15 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 57025.2
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.

Let's proceed to step 9:
0 divided by 15 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 57025.2
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 quotient of the division is 57025.2, and the remainder is 0.0.