We look at the division of 42180487 by 878 
We're looking to find how many times 878 goes into 42180487.

Advancing to step 1:
When dividing 4 by 878, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 878

On to step 2:
If we divide 42 by 878, we get 0 and a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Append the next digit (1) from the dividend to 42 and continue with: 421 / 878

On to step 3:
878 can be fit into 421 0 times, resulting in a remainder of 421.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 421, we get 421.
Take the next digit (8) from the dividend and append it to 421, then repeat: 4218 / 878

Let's proceed to step 4:
878 can be fit into 4218 4 times, resulting in a remainder of 706.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 3512 away from 4218, we end up with 706.
Append the next digit (0) from the dividend to 706 and continue with: 7060 / 878

Step 5:
878 can be fit into 7060 8 times, resulting in a remainder of 36.
Put 8 as the next digit of the answer. 
Result so far: 48.0
If we take 7024 away from 7060, we end up with 36.
Fetch the next digit (4) from the dividend, attach it to 36 and continue: 364 / 878

Going ahead to step 6:
364 divided by 878 is 0 with a remainder of 364.
Write down 0 as next digit of the result. 
Result so far: 480.0
If we take 0 away from 364, we end up with 364.
Append the next digit (8) from the dividend to 364 and continue with: 3648 / 878

On to step 7:
878 can be fit into 3648 4 times, resulting in a remainder of 136.
Write down 4 as next digit of the result. 
Result so far: 4804.0
If we take 3512 away from 3648, we end up with 136.
Include the next digit (7) from the dividend after 136, then repeat: 1367 / 878

Moving on to step 8:
If we divide 1367 by 878, we get 1 and a remainder of 489.
Write down 1 as next digit of the result. 
Result so far: 48041.0
If we subtract 878 from 1367, we get 489.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4890, and continue the process.

Step 9:
When dividing 4890 by 878, we get 5 with a remainder of 500.
Record the quotient 5 as the next digit in the result. 
Result so far: 48041.5
The remainder is 500 after subtracting 4390 from 4890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Advancing to step 10:
The number 878 fits into 5000 5 times, leaving a remainder of 610.
Write down 5 as next digit of the result. 
Result so far: 48041.55
If we take 4390 away from 5000, we end up with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Our division results in 48041.55 with a remaining 0.61.