We divide 143988 by 5
We're looking to find how many times 5 goes into 143988.

Step 1:
5 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 5

On to step 2:
5 goes into 14 2 times with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 10 from 14 to get 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 5

Going ahead to step 3:
5 can be fit into 43 8 times, resulting in a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 28.0
Subtracting 40 from 43 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 5

Going ahead to step 4:
When dividing 39 by 5, we get 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 287.0
Deduct 35 from 39 and we're left with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 5

On to step 5:
The number 5 fits into 48 9 times, leaving a remainder of 3.
The next digit of our result is 9. 
Result so far: 2879.0
If we subtract 45 from 48, we get 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 5

On to step 6:
5 can be fit into 38 7 times, resulting in a remainder of 3.
The next digit of our result is 7. 
Result so far: 28797.0
Subtract 35 from 38 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
If we divide 30 by 5, we get 6 and a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 28797.6
Subtract 30 from 30 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
0 divided by 5 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 28797.6
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
The number 5 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 28797.6
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 28797.6, with a leftover of 0.0.