We're dividing 42535856 by 819 
We want to divide 42535856 by 819.

On to step 1:
When dividing 4 by 819, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 819

Advancing to step 2:
42 divided by 819 is 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Bring next digit (5) of the dividend behind the 42 and repeat the process: 425 / 819

Advancing to step 3:
When dividing 425 by 819, we get 0 with a remainder of 425.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 425, we get 425.
Append the next digit (3) from the dividend to 425 and continue with: 4253 / 819

Going ahead to step 4:
The number 819 fits into 4253 5 times, leaving a remainder of 158.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 158 after subtracting 4095 from 4253.
Bring next digit (5) of the dividend behind the 158 and repeat the process: 1585 / 819

Advancing to step 5:
When dividing 1585 by 819, we get 1 with a remainder of 766.
Use 1 as the next digit of our solution. 
Result so far: 51.0
The remainder is 766 after subtracting 819 from 1585.
Fetch the next digit (8) from the dividend, attach it to 766 and continue: 7668 / 819

On to step 6:
The number 819 fits into 7668 9 times, leaving a remainder of 297.
Put 9 as the next digit of the answer. 
Result so far: 519.0
If we subtract 7371 from 7668, we get 297.
Include the next digit (5) from the dividend after 297, then repeat: 2975 / 819

Advancing to step 7:
When dividing 2975 by 819, we get 3 with a remainder of 518.
Use 3 as the next digit of our solution. 
Result so far: 5193.0
Subtract 2457 from 2975 to get 518.
Take the next digit (6) from the dividend and append it to 518, then repeat: 5186 / 819

Moving on to step 8:
819 goes into 5186 6 times with a remainder of 272.
Use 6 as the next digit of our solution. 
Result so far: 51936.0
If we take 4914 away from 5186, we end up with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Step 9:
The number 819 fits into 2720 3 times, leaving a remainder of 263.
Record the quotient 3 as the next digit in the result. 
Result so far: 51936.3
Deduct 2457 from 2720 and we're left with 263.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2630, and continue the process.

Let's proceed to step 10:
819 can be fit into 2630 3 times, resulting in a remainder of 173.
The next digit of our result is 3. 
Result so far: 51936.33
Subtract 2457 from 2630 to get 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

The final result is 51936.33 with a remainder of 0.173.