We look at the division of 13991 by 45 
Let's see how many times 45 fits into 13991.

On to step 1:
When dividing 1 by 45, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 45

Let's proceed to step 2:
When dividing 13 by 45, we get 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 45

Let's proceed to step 3:
The number 45 fits into 139 3 times, leaving a remainder of 4.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 4 after subtracting 135 from 139.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 45

On to step 4:
The number 45 fits into 49 1 times, leaving a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 31.0
Subtract 45 from 49 to get 4.
Include the next digit (1) from the dividend after 4, then repeat: 41 / 45

Going ahead to step 5:
45 goes into 41 0 times with a remainder of 41.
Write down 0 as next digit of the result. 
Result so far: 310.0
The remainder is 41 after subtracting 0 from 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 6:
The number 45 fits into 410 9 times, leaving a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 310.9
Subtract 405 from 410 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
When dividing 50 by 45, we get 1 with a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 310.91
Subtract 45 from 50 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
When dividing 50 by 45, we get 1 with a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 310.911
If we subtract 45 from 50, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

In conclusion, the division gives 310.911 with a balance of 0.0005.