We look at the division of 23991 by 58 
Let's see how many times 58 fits into 23991.

Going ahead to step 1:
58 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 58

On to step 2:
58 goes into 23 0 times with a remainder of 23.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 23 after subtracting 0 from 23.
Take the next digit (9) from the dividend and append it to 23, then repeat: 239 / 58

Advancing to step 3:
If we divide 239 by 58, we get 4 and a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 232 away from 239, we end up with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 58

Moving on to step 4:
58 can be fit into 79 1 times, resulting in a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 41.0
The remainder is 21 after subtracting 58 from 79.
Grab the next digit (1) from the dividend, add it to 21, then carry on: 211 / 58

Going ahead to step 5:
58 goes into 211 3 times with a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 413.0
Subtracting 174 from 211 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 6:
The number 58 fits into 370 6 times, leaving a remainder of 22.
Use 6 as the next digit of our solution. 
Result so far: 413.6
If we take 348 away from 370, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
If we divide 220 by 58, we get 3 and a remainder of 46.
The next digit of our result is 3. 
Result so far: 413.63
Deduct 174 from 220 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 8:
58 can be fit into 460 7 times, resulting in a remainder of 54.
Put 7 as the next digit of the answer. 
Result so far: 413.637
Subtract 406 from 460 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 9:
58 can be fit into 540 9 times, resulting in a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 413.6379
Subtracting 522 from 540 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 10:
58 can be fit into 180 3 times, resulting in a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 413.63793
If we take 174 away from 180, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 11:
60 divided by 58 is 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 413.637931
Subtracting 58 from 60 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 12:
When dividing 20 by 58, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 413.637931
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 13:
58 goes into 200 3 times with a remainder of 26.
Record the quotient 3 as the next digit in the result. 
Result so far: 413.63793103
Deduct 174 from 200 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

After the division, we end up with 413.63793103 and a remainder of 2.6e-08.