We look at the division of 91151994 by 331 
We're looking to find how many times 331 goes into 91151994.

Advancing to step 1:
9 divided by 331 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 331

Let's proceed to step 2:
91 divided by 331 is 0 with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Include the next digit (1) from the dividend after 91, then repeat: 911 / 331

Step 3:
The number 331 fits into 911 2 times, leaving a remainder of 249.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 662 from 911, we get 249.
Fetch the next digit (5) from the dividend, attach it to 249 and continue: 2495 / 331

Advancing to step 4:
When dividing 2495 by 331, we get 7 with a remainder of 178.
Use 7 as the next digit of our solution. 
Result so far: 27.0
If we subtract 2317 from 2495, we get 178.
Include the next digit (1) from the dividend after 178, then repeat: 1781 / 331

On to step 5:
1781 divided by 331 is 5 with a remainder of 126.
Write down 5 as next digit of the result. 
Result so far: 275.0
Subtract 1655 from 1781 to get 126.
Take the next digit (9) from the dividend and append it to 126, then repeat: 1269 / 331

Let's proceed to step 6:
When dividing 1269 by 331, we get 3 with a remainder of 276.
Put 3 as the next digit of the answer. 
Result so far: 2753.0
If we take 993 away from 1269, we end up with 276.
Bring next digit (9) of the dividend behind the 276 and repeat the process: 2769 / 331

Let's proceed to step 7:
If we divide 2769 by 331, we get 8 and a remainder of 121.
Use 8 as the next digit of our solution. 
Result so far: 27538.0
Subtracting 2648 from 2769 leaves us with 121.
Include the next digit (4) from the dividend after 121, then repeat: 1214 / 331

Advancing to step 8:
331 goes into 1214 3 times with a remainder of 221.
The next digit of our result is 3. 
Result so far: 275383.0
Deduct 993 from 1214 and we're left with 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Let's proceed to step 9:
If we divide 2210 by 331, we get 6 and a remainder of 224.
Use 6 as the next digit of our solution. 
Result so far: 275383.6
The remainder is 224 after subtracting 1986 from 2210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 10:
The number 331 fits into 2240 6 times, leaving a remainder of 254.
Put 6 as the next digit of the answer. 
Result so far: 275383.66
The remainder is 254 after subtracting 1986 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

The final outcome is 275383.66, with a leftover of 0.254.