We look at the division of 391916 by 91 
Let's see how many times 91 fits into 391916.

Step 1:
91 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 91

Step 2:
91 goes into 39 0 times with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Fetch the next digit (1) from the dividend, attach it to 39 and continue: 391 / 91

On to step 3:
The number 91 fits into 391 4 times, leaving a remainder of 27.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 27 after subtracting 364 from 391.
Take the next digit (9) from the dividend and append it to 27, then repeat: 279 / 91

Advancing to step 4:
The number 91 fits into 279 3 times, leaving a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
If we subtract 273 from 279, we get 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 91

Going ahead to step 5:
When dividing 61 by 91, we get 0 with a remainder of 61.
The next digit of our result is 0. 
Result so far: 430.0
If we subtract 0 from 61, we get 61.
Grab the next digit (6) from the dividend, add it to 61, then carry on: 616 / 91

Advancing to step 6:
616 divided by 91 is 6 with a remainder of 70.
The number 6 becomes the next digit in our result. 
Result so far: 4306.0
Subtracting 546 from 616 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 7:
91 can be fit into 700 7 times, resulting in a remainder of 63.
Record the quotient 7 as the next digit in the result. 
Result so far: 4306.7
Subtracting 637 from 700 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Let's proceed to step 8:
91 goes into 630 6 times with a remainder of 84.
The number 6 becomes the next digit in our result. 
Result so far: 4306.76
If we take 546 away from 630, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Going ahead to step 9:
91 can be fit into 840 9 times, resulting in a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 4306.769
Deduct 819 from 840 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 10:
When dividing 210 by 91, we get 2 with a remainder of 28.
The next digit of our result is 2. 
Result so far: 4306.7692
Deduct 182 from 210 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 11:
280 divided by 91 is 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 4306.76923
Subtracting 273 from 280 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 12:
The number 91 fits into 70 0 times, leaving a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 4306.76923
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 13:
91 can be fit into 700 7 times, resulting in a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 4306.7692307
Subtracting 637 from 700 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Going ahead to step 14:
When dividing 630 by 91, we get 6 with a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 4306.76923076
The remainder is 84 after subtracting 546 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

The final outcome is 4306.76923076, with a leftover of 8.4e-08.