Let's divide 131239 by 3
We want to figure out the number of times 131239 can be divided by 3.

Advancing to step 1:
The number 3 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 3

Going ahead to step 2:
3 can be fit into 13 4 times, resulting in a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 12 away from 13, we end up with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 3

Advancing to step 3:
3 goes into 11 3 times with a remainder of 2.
The next digit of our result is 3. 
Result so far: 43.0
If we take 9 away from 11, we end up with 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 3

Step 4:
22 divided by 3 is 7 with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 437.0
Deduct 21 from 22 and we're left with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 3

On to step 5:
If we divide 13 by 3, we get 4 and a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4374.0
The remainder is 1 after subtracting 12 from 13.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 3

Going ahead to step 6:
19 divided by 3 is 6 with a remainder of 1.
The next digit of our result is 6. 
Result so far: 43746.0
Deduct 18 from 19 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
10 divided by 3 is 3 with a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 43746.3
Deduct 9 from 10 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 8:
When dividing 10 by 3, we get 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 43746.33
Subtract 9 from 10 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 43746.33, with a leftover of 0.001.