We look at the division of 16109438 by 991 
We're looking to find how many times 991 goes into 16109438.

Step 1:
1 divided by 991 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 991

Step 2:
When dividing 16 by 991, we get 0 with a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Append the next digit (1) from the dividend to 16 and continue with: 161 / 991

Advancing to step 3:
When dividing 161 by 991, we get 0 with a remainder of 161.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 161 leaves us with 161.
Append the next digit (0) from the dividend to 161 and continue with: 1610 / 991

Moving on to step 4:
If we divide 1610 by 991, we get 1 and a remainder of 619.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 991 from 1610, we get 619.
Append the next digit (9) from the dividend to 619 and continue with: 6199 / 991

Moving on to step 5:
If we divide 6199 by 991, we get 6 and a remainder of 253.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtract 5946 from 6199 to get 253.
Append the next digit (4) from the dividend to 253 and continue with: 2534 / 991

Moving on to step 6:
When dividing 2534 by 991, we get 2 with a remainder of 552.
The next digit of our result is 2. 
Result so far: 162.0
The remainder is 552 after subtracting 1982 from 2534.
Include the next digit (3) from the dividend after 552, then repeat: 5523 / 991

Moving on to step 7:
If we divide 5523 by 991, we get 5 and a remainder of 568.
Put 5 as the next digit of the answer. 
Result so far: 1625.0
Deduct 4955 from 5523 and we're left with 568.
Append the next digit (8) from the dividend to 568 and continue with: 5688 / 991

Advancing to step 8:
When dividing 5688 by 991, we get 5 with a remainder of 733.
The next digit of our result is 5. 
Result so far: 16255.0
Subtracting 4955 from 5688 leaves us with 733.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7330, and continue the process.

Step 9:
7330 divided by 991 is 7 with a remainder of 393.
The next digit of our result is 7. 
Result so far: 16255.7
Subtracting 6937 from 7330 leaves us with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

On to step 10:
991 can be fit into 3930 3 times, resulting in a remainder of 957.
The next digit of our result is 3. 
Result so far: 16255.73
Subtracting 2973 from 3930 leaves us with 957.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9570, and continue the process.

On to step 11:
9570 divided by 991 is 9 with a remainder of 651.
Record the quotient 9 as the next digit in the result. 
Result so far: 16255.739
Deduct 8919 from 9570 and we're left with 651.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6510, and continue the process.

Going ahead to step 12:
991 can be fit into 6510 6 times, resulting in a remainder of 564.
Put 6 as the next digit of the answer. 
Result so far: 16255.7396
If we subtract 5946 from 6510, we get 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Let's proceed to step 13:
If we divide 5640 by 991, we get 5 and a remainder of 685.
Use 5 as the next digit of our solution. 
Result so far: 16255.73965
Subtract 4955 from 5640 to get 685.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6850, and continue the process.

On to step 14:
991 goes into 6850 6 times with a remainder of 904.
The next digit of our result is 6. 
Result so far: 16255.739656
If we subtract 5946 from 6850, we get 904.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9040, and continue the process.

Advancing to step 15:
991 goes into 9040 9 times with a remainder of 121.
The next digit of our result is 9. 
Result so far: 16255.7396569
If we take 8919 away from 9040, we end up with 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

On to step 16:
1210 divided by 991 is 1 with a remainder of 219.
Put 1 as the next digit of the answer. 
Result so far: 16255.73965691
If we take 991 away from 1210, we end up with 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

The final result is 16255.73965691 with a remainder of 2.19e-07.