Let's divide 139512 by 36
Our goal is to divide 139512 by 36.

Going ahead to step 1:
If we divide 1 by 36, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 36

Moving on to step 2:
If we divide 13 by 36, we get 0 and a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Bring next digit (9) of the dividend behind the 13 and repeat the process: 139 / 36

Let's proceed to step 3:
The number 36 fits into 139 3 times, leaving a remainder of 31.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 108 away from 139, we end up with 31.
Take the next digit (5) from the dividend and append it to 31, then repeat: 315 / 36

On to step 4:
The number 36 fits into 315 8 times, leaving a remainder of 27.
The next digit of our result is 8. 
Result so far: 38.0
The remainder is 27 after subtracting 288 from 315.
Include the next digit (1) from the dividend after 27, then repeat: 271 / 36

Moving on to step 5:
36 goes into 271 7 times with a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 387.0
If we take 252 away from 271, we end up with 19.
Fetch the next digit (2) from the dividend, attach it to 19 and continue: 192 / 36

Let's proceed to step 6:
If we divide 192 by 36, we get 5 and a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 3875.0
If we take 180 away from 192, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
When dividing 120 by 36, we get 3 with a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 3875.3
Deduct 108 from 120 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
36 can be fit into 120 3 times, resulting in a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 3875.33
If we take 108 away from 120, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 3875.33 with a remainder of 0.012.