91891 divided by 42 
We want to figure out the number of times 91891 can be divided by 42.

Advancing to step 1:
When dividing 9 by 42, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 42

Moving on to step 2:
The number 42 fits into 91 2 times, leaving a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 84 away from 91, we end up with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 42

Going ahead to step 3:
42 can be fit into 78 1 times, resulting in a remainder of 36.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Deduct 42 from 78 and we're left with 36.
Include the next digit (9) from the dividend after 36, then repeat: 369 / 42

Let's proceed to step 4:
42 can be fit into 369 8 times, resulting in a remainder of 33.
The number 8 becomes the next digit in our result. 
Result so far: 218.0
Deduct 336 from 369 and we're left with 33.
Include the next digit (1) from the dividend after 33, then repeat: 331 / 42

Let's proceed to step 5:
42 can be fit into 331 7 times, resulting in a remainder of 37.
The next digit of our result is 7. 
Result so far: 2187.0
Subtracting 294 from 331 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 6:
370 divided by 42 is 8 with a remainder of 34.
Use 8 as the next digit of our solution. 
Result so far: 2187.8
If we subtract 336 from 370, we 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.

Let's proceed to step 7:
If we divide 340 by 42, we get 8 and a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 2187.88
Subtract 336 from 340 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 2187.88 and a remainder of 0.004.