Let's divide 42135156 by 823
We want to divide 42135156 by 823.

Step 1:
When dividing 4 by 823, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our 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 / 823

On to step 2:
42 divided by 823 is 0 with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 823

Moving on to step 3:
823 goes into 421 0 times with a remainder of 421.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 421 after subtracting 0 from 421.
Include the next digit (3) from the dividend after 421, then repeat: 4213 / 823

On to step 4:
The number 823 fits into 4213 5 times, leaving a remainder of 98.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 4115 from 4213 to get 98.
Append the next digit (5) from the dividend to 98 and continue with: 985 / 823

Moving on to step 5:
985 divided by 823 is 1 with a remainder of 162.
Use 1 as the next digit of our solution. 
Result so far: 51.0
If we take 823 away from 985, we end up with 162.
Include the next digit (1) from the dividend after 162, then repeat: 1621 / 823

Going ahead to step 6:
If we divide 1621 by 823, we get 1 and a remainder of 798.
Use 1 as the next digit of our solution. 
Result so far: 511.0
If we take 823 away from 1621, we end up with 798.
Grab the next digit (5) from the dividend, add it to 798, then carry on: 7985 / 823

Advancing to step 7:
823 can be fit into 7985 9 times, resulting in a remainder of 578.
The number 9 becomes the next digit in our result. 
Result so far: 5119.0
Deduct 7407 from 7985 and we're left with 578.
Take the next digit (6) from the dividend and append it to 578, then repeat: 5786 / 823

On to step 8:
If we divide 5786 by 823, we get 7 and a remainder of 25.
The number 7 becomes the next digit in our result. 
Result so far: 51197.0
Subtract 5761 from 5786 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
823 goes into 250 0 times with a remainder of 250.
Write down 0 as next digit of the result. 
Result so far: 51197.0
Deduct 0 from 250 and we're left with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 10:
2500 divided by 823 is 3 with a remainder of 31.
Put 3 as the next digit of the answer. 
Result so far: 51197.03
Subtract 2469 from 2500 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 11:
The number 823 fits into 310 0 times, leaving a remainder of 310.
The number 0 becomes the next digit in our result. 
Result so far: 51197.03
Deduct 0 from 310 and we're left with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Let's proceed to step 12:
When dividing 3100 by 823, we get 3 with a remainder of 631.
Record the quotient 3 as the next digit in the result. 
Result so far: 51197.0303
If we take 2469 away from 3100, we end up with 631.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6310, and continue the process.

On to step 13:
823 goes into 6310 7 times with a remainder of 549.
The next digit of our result is 7. 
Result so far: 51197.03037
If we subtract 5761 from 6310, we get 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

On to step 14:
823 can be fit into 5490 6 times, resulting in a remainder of 552.
Use 6 as the next digit of our solution. 
Result so far: 51197.030376
If we subtract 4938 from 5490, we get 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

On to step 15:
5520 divided by 823 is 6 with a remainder of 582.
The next digit of our result is 6. 
Result so far: 51197.0303766
If we subtract 4938 from 5520, we get 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

The final outcome is 51197.0303766, with a leftover of 5.82e-06.