We look at the division of 809813 by 42 
Let's see how many times 42 fits into 809813.

On to step 1:
8 divided by 42 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 42

Let's proceed to step 2:
The number 42 fits into 80 1 times, leaving a remainder of 38.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 42 from 80 and we're left with 38.
Grab the next digit (9) from the dividend, add it to 38, then carry on: 389 / 42

Advancing to step 3:
42 can be fit into 389 9 times, resulting in a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
The remainder is 11 after subtracting 378 from 389.
Grab the next digit (8) from the dividend, add it to 11, then carry on: 118 / 42

Step 4:
42 can be fit into 118 2 times, resulting in a remainder of 34.
The number 2 becomes the next digit in our result. 
Result so far: 192.0
If we subtract 84 from 118, we get 34.
Include the next digit (1) from the dividend after 34, then repeat: 341 / 42

Advancing to step 5:
The number 42 fits into 341 8 times, leaving a remainder of 5.
The number 8 becomes the next digit in our result. 
Result so far: 1928.0
Subtracting 336 from 341 leaves us with 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 42

Moving on to step 6:
42 goes into 53 1 times with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 19281.0
If we take 42 away from 53, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
42 can be fit into 110 2 times, resulting in a remainder of 26.
Record the quotient 2 as the next digit in the result. 
Result so far: 19281.2
If we take 84 away from 110, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 8:
If we divide 260 by 42, we get 6 and a remainder of 8.
The next digit of our result is 6. 
Result so far: 19281.26
Subtracting 252 from 260 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
42 goes into 80 1 times with a remainder of 38.
The next digit of our result is 1. 
Result so far: 19281.261
If we subtract 42 from 80, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 10:
380 divided by 42 is 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 19281.2619
Subtract 378 from 380 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 11:
42 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 19281.2619
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 12:
200 divided by 42 is 4 with a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 19281.261904
If we take 168 away from 200, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 13:
320 divided by 42 is 7 with a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 19281.2619047
Deduct 294 from 320 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 14:
42 goes into 260 6 times with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 19281.26190476
If we take 252 away from 260, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 19281.26190476 and a remainder of 8e-09.