Let's divide 129855 by 17
We want to figure out the number of times 129855 can be divided by 17.

Going ahead to step 1:
The number 17 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 17

Step 2:
When dividing 12 by 17, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 17

On to step 3:
The number 17 fits into 129 7 times, leaving a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 10 after subtracting 119 from 129.
Append the next digit (8) from the dividend to 10 and continue with: 108 / 17

Step 4:
The number 17 fits into 108 6 times, leaving a remainder of 6.
The next digit of our result is 6. 
Result so far: 76.0
Subtracting 102 from 108 leaves us with 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 17

Going ahead to step 5:
The number 17 fits into 65 3 times, leaving a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 763.0
Subtract 51 from 65 to get 14.
Fetch the next digit (5) from the dividend, attach it to 14 and continue: 145 / 17

Let's proceed to step 6:
17 goes into 145 8 times with a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 7638.0
If we take 136 away from 145, we end up 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.

Let's proceed to step 7:
90 divided by 17 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 7638.5
If we take 85 away from 90, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
50 divided by 17 is 2 with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 7638.52
The remainder is 16 after subtracting 34 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
160 divided by 17 is 9 with a remainder of 7.
The next digit of our result is 9. 
Result so far: 7638.529
If we take 153 away from 160, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 10:
17 goes into 70 4 times with a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 7638.5294
The remainder is 2 after subtracting 68 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 11:
17 goes into 20 1 times with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 7638.52941
The remainder is 3 after subtracting 17 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 12:
30 divided by 17 is 1 with a remainder of 13.
The next digit of our result is 1. 
Result so far: 7638.529411
Deduct 17 from 30 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 7638.529411 with a remainder of 1.3e-06.