We look at the division of 139159 by 31 
Our goal is to divide 139159 by 31.

On to step 1:
1 divided by 31 is 0 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.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 31

Moving on to step 2:
The number 31 fits into 13 0 times, leaving a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 31

Advancing to step 3:
31 goes into 139 4 times with a remainder of 15.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 124 from 139 leaves us with 15.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 31

Let's proceed to step 4:
The number 31 fits into 151 4 times, leaving a remainder of 27.
Record the quotient 4 as the next digit in the result. 
Result so far: 44.0
Subtracting 124 from 151 leaves us with 27.
Grab the next digit (5) from the dividend, add it to 27, then carry on: 275 / 31

Let's proceed to step 5:
If we divide 275 by 31, we get 8 and a remainder of 27.
The number 8 becomes the next digit in our result. 
Result so far: 448.0
Subtracting 248 from 275 leaves us with 27.
Bring next digit (9) of the dividend behind the 27 and repeat the process: 279 / 31

On to step 6:
279 divided by 31 is 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 4489.0
If we subtract 279 from 279, 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.

Moving on to step 7:
31 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 4489.0
The remainder is 0 after subtracting 0 from 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:
If we divide 0 by 31, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 4489.0
Subtract 0 from 0 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.

The final outcome is 4489.0, with a leftover of 0.0.