We look at the division of 428085 by 42 
We're looking to find how many times 42 goes into 428085.

Step 1:
The number 42 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 42

Going ahead to step 2:
42 goes into 42 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 42 away from 42, we end up with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 42

On to step 3:
If we divide 8 by 42, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 42

On to step 4:
The number 42 fits into 80 1 times, leaving a remainder of 38.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
If we take 42 away from 80, we end up with 38.
Bring next digit (8) of the dividend behind the 38 and repeat the process: 388 / 42

Advancing to step 5:
42 can be fit into 388 9 times, resulting in a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 1019.0
Subtract 378 from 388 to get 10.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 42

Going ahead to step 6:
105 divided by 42 is 2 with a remainder of 21.
Use 2 as the next digit of our solution. 
Result so far: 10192.0
The remainder is 21 after subtracting 84 from 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 7:
The number 42 fits into 210 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 10192.5
If we subtract 210 from 210, 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:
42 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10192.5
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.

On to step 9:
42 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10192.5
If we subtract 0 from 0, 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.

The final outcome is 10192.5, with a leftover of 0.0.