We're dividing 143139 by 10 
Our goal is to divide 143139 by 10.

Moving on to step 1:
10 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 10

Moving on to step 2:
14 divided by 10 is 1 with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 10 from 14, we get 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 10

Going ahead to step 3:
If we divide 43 by 10, we get 4 and a remainder of 3.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 40 from 43, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 10

Step 4:
31 divided by 10 is 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 143.0
The remainder is 1 after subtracting 30 from 31.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 10

Going ahead to step 5:
10 can be fit into 13 1 times, resulting in a remainder of 3.
The next digit of our result is 1. 
Result so far: 1431.0
If we subtract 10 from 13, we get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 10

Step 6:
The number 10 fits into 39 3 times, leaving a remainder of 9.
The next digit of our result is 3. 
Result so far: 14313.0
Subtracting 30 from 39 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
10 goes into 90 9 times with a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 14313.9
If we subtract 90 from 90, 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.

Let's proceed to step 8:
0 divided by 10 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 14313.9
If we take 0 away from 0, we end up 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.

Moving on to step 9:
10 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 14313.9
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.

The final result is 14313.9 with a remainder of 0.0.