We look at the division of 840129 by 17 
Let's see how many times 17 fits into 840129.

Moving on to step 1:
The number 17 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 17

Advancing to step 2:
84 divided by 17 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 4.0
If we take 68 away from 84, we end up with 16.
Grab the next digit (0) from the dividend, add it to 16, then carry on: 160 / 17

On to step 3:
When dividing 160 by 17, we get 9 with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
If we subtract 153 from 160, we get 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 17

Let's proceed to step 4:
17 can be fit into 71 4 times, resulting in a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 494.0
If we subtract 68 from 71, we get 3.
Grab the next digit (2) from the dividend, add it to 3, then carry on: 32 / 17

On to step 5:
17 can be fit into 32 1 times, resulting in a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 4941.0
The remainder is 15 after subtracting 17 from 32.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 17

Advancing to step 6:
If we divide 159 by 17, we get 9 and a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 49419.0
If we take 153 away from 159, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
When dividing 60 by 17, we get 3 with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 49419.3
If we take 51 away from 60, 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.

Moving on to step 8:
17 can be fit into 90 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 49419.35
Subtract 85 from 90 to get 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 9:
17 goes into 50 2 times with a remainder of 16.
The next digit of our result is 2. 
Result so far: 49419.352
Subtracting 34 from 50 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
The number 17 fits into 160 9 times, leaving a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 49419.3529
If we subtract 153 from 160, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 11:
70 divided by 17 is 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 49419.35294
If we subtract 68 from 70, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 12:
17 goes into 20 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 49419.352941
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.

Moving on to step 13:
If we divide 30 by 17, we get 1 and a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 49419.3529411
If we subtract 17 from 30, we get 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 49419.3529411 with a remainder of 1.3e-07.