We divide 102391 by 18
We want to figure out the number of times 102391 can be divided by 18.

Moving on to step 1:
18 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 18

Step 2:
18 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 10 after subtracting 0 from 10.
Fetch the next digit (2) from the dividend, attach it to 10 and continue: 102 / 18

Moving on to step 3:
If we divide 102 by 18, we get 5 and a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 90 from 102, we get 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 18

Advancing to step 4:
When dividing 123 by 18, we get 6 with a remainder of 15.
The next digit of our result is 6. 
Result so far: 56.0
If we take 108 away from 123, we end up with 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 18

Step 5:
When dividing 159 by 18, we get 8 with a remainder of 15.
The number 8 becomes the next digit in our result. 
Result so far: 568.0
If we take 144 away from 159, we end up with 15.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 18

Step 6:
The number 18 fits into 151 8 times, leaving a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 5688.0
Subtracting 144 from 151 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 7:
18 goes into 70 3 times with a remainder of 16.
The next digit of our result is 3. 
Result so far: 5688.3
Subtract 54 from 70 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 8:
The number 18 fits into 160 8 times, leaving a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 5688.38
Subtracting 144 from 160 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
18 can be fit into 160 8 times, resulting in a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 5688.388
Subtract 144 from 160 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

In conclusion, the division gives 5688.388 with a balance of 0.0016.