We're dividing 168509 by 4 
We want to divide 168509 by 4.

Advancing to step 1:
1 divided by 4 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 4

Moving on to step 2:
4 can be fit into 16 4 times, resulting in a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 16 from 16 to get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 4

Advancing to step 3:
8 divided by 4 is 2 with a remainder of 0.
The next digit of our result is 2. 
Result so far: 42.0
Deduct 8 from 8 and we're left with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 4

Advancing to step 4:
The number 4 fits into 5 1 times, leaving a remainder of 1.
The next digit of our result is 1. 
Result so far: 421.0
The remainder is 1 after subtracting 4 from 5.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 4

Let's proceed to step 5:
4 goes into 10 2 times with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 4212.0
Subtract 8 from 10 to get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 4

Moving on to step 6:
If we divide 29 by 4, we get 7 and a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 42127.0
Subtract 28 from 29 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.

Going ahead to step 7:
The number 4 fits into 10 2 times, leaving a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 42127.2
Subtract 8 from 10 to 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.

Let's proceed to step 8:
4 goes into 20 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 42127.25
If we take 20 away from 20, 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.

Step 9:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42127.25
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.

Going ahead to step 10:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42127.25
If we subtract 0 from 0, 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.

In conclusion, the division gives 42127.25 with a balance of 0.0.