855120 ÷ 42 
We're looking to find how many times 42 goes into 855120.

Let's proceed to step 1:
8 divided by 42 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 42

Let's proceed to step 2:
The number 42 fits into 85 2 times, leaving a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 84 away from 85, we end up with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 42

Moving on to step 3:
42 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 20.0
If we subtract 0 from 15, we get 15.
Append the next digit (1) from the dividend to 15 and continue with: 151 / 42

Advancing to step 4:
42 goes into 151 3 times with a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 203.0
If we subtract 126 from 151, we get 25.
Grab the next digit (2) from the dividend, add it to 25, then carry on: 252 / 42

Let's proceed to step 5:
42 goes into 252 6 times with a remainder of 0.
The next digit of our result is 6. 
Result so far: 2036.0
If we subtract 252 from 252, we get 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 42

Advancing to step 6:
The number 42 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 20360.0
If we take 0 away from 0, 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.

Step 7:
42 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 20360.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
0 divided by 42 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 20360.0
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.

In conclusion, the division gives 20360.0 with a balance of 0.0.