We look at the division of 42640191 by 842 
We want to figure out the number of times 42640191 can be divided by 842.

Moving on to step 1:
842 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 842

Moving on to step 2:
42 divided by 842 is 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Grab the next digit (6) from the dividend, add it to 42, then carry on: 426 / 842

Moving on to step 3:
When dividing 426 by 842, we get 0 with a remainder of 426.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 426 leaves us with 426.
Bring next digit (4) of the dividend behind the 426 and repeat the process: 4264 / 842

Advancing to step 4:
When dividing 4264 by 842, we get 5 with a remainder of 54.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 4210 from 4264 to get 54.
Bring next digit (0) of the dividend behind the 54 and repeat the process: 540 / 842

Let's proceed to step 5:
When dividing 540 by 842, we get 0 with a remainder of 540.
The number 0 becomes the next digit in our result. 
Result so far: 50.0
Subtract 0 from 540 to get 540.
Include the next digit (1) from the dividend after 540, then repeat: 5401 / 842

Advancing to step 6:
When dividing 5401 by 842, we get 6 with a remainder of 349.
Record the quotient 6 as the next digit in the result. 
Result so far: 506.0
Subtract 5052 from 5401 to get 349.
Bring next digit (9) of the dividend behind the 349 and repeat the process: 3499 / 842

Going ahead to step 7:
The number 842 fits into 3499 4 times, leaving a remainder of 131.
Write down 4 as next digit of the result. 
Result so far: 5064.0
Deduct 3368 from 3499 and we're left with 131.
Include the next digit (1) from the dividend after 131, then repeat: 1311 / 842

Going ahead to step 8:
If we divide 1311 by 842, we get 1 and a remainder of 469.
Write down 1 as next digit of the result. 
Result so far: 50641.0
Subtract 842 from 1311 to get 469.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4690, and continue the process.

Moving on to step 9:
The number 842 fits into 4690 5 times, leaving a remainder of 480.
The next digit of our result is 5. 
Result so far: 50641.5
Subtracting 4210 from 4690 leaves us with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 10:
842 goes into 4800 5 times with a remainder of 590.
Record the quotient 5 as the next digit in the result. 
Result so far: 50641.55
Deduct 4210 from 4800 and we're left with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

The final outcome is 50641.55, with a leftover of 0.59.