We look at the division of 129585 by 3 
Let's see how many times 3 fits into 129585.

On to step 1:
3 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 3

On to step 2:
If we divide 12 by 3, we get 4 and a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 12 away from 12, we end up with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 3

Advancing to step 3:
3 can be fit into 9 3 times, resulting in a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 43.0
If we subtract 9 from 9, we get 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 3

Let's proceed to step 4:
If we divide 5 by 3, we get 1 and a remainder of 2.
The next digit of our result is 1. 
Result so far: 431.0
Subtracting 3 from 5 leaves us with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 3

On to step 5:
28 divided by 3 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 4319.0
If we take 27 away from 28, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 3

Step 6:
If we divide 15 by 3, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 43195.0
If we subtract 15 from 15, 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 7:
The number 3 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 43195.0
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.

On to step 8:
0 divided by 3 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 43195.0
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.

After the division, we end up with 43195.0 and a remainder of 0.0.