We look at the division of 391819 by 42 
We want to divide 391819 by 42.

Going ahead to step 1:
42 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 42

Going ahead to step 2:
39 divided by 42 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Include the next digit (1) from the dividend after 39, then repeat: 391 / 42

Advancing to step 3:
If we divide 391 by 42, we get 9 and a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 378 from 391 and we're left with 13.
Append the next digit (8) from the dividend to 13 and continue with: 138 / 42

Advancing to step 4:
When dividing 138 by 42, we get 3 with a remainder of 12.
The next digit of our result is 3. 
Result so far: 93.0
Subtracting 126 from 138 leaves us with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 42

Moving on to step 5:
42 goes into 121 2 times with a remainder of 37.
Write down 2 as next digit of the result. 
Result so far: 932.0
The remainder is 37 after subtracting 84 from 121.
Fetch the next digit (9) from the dividend, attach it to 37 and continue: 379 / 42

On to step 6:
If we divide 379 by 42, we get 9 and a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 9329.0
Subtracting 378 from 379 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
When dividing 10 by 42, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 9329.0
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
If we divide 100 by 42, we get 2 and a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 9329.02
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
160 divided by 42 is 3 with a remainder of 34.
Put 3 as the next digit of the answer. 
Result so far: 9329.023
Subtract 126 from 160 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
The number 42 fits into 340 8 times, leaving a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 9329.0238
Deduct 336 from 340 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 11:
42 can be fit into 40 0 times, resulting in a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 9329.0238
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 12:
When dividing 400 by 42, we get 9 with a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 9329.023809
Subtracting 378 from 400 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 13:
When dividing 220 by 42, we get 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 9329.0238095
Subtracting 210 from 220 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 14:
When dividing 100 by 42, we get 2 with a remainder of 16.
The next digit of our result is 2. 
Result so far: 9329.02380952
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 9329.02380952 with a remainder of 1.6e-08.