We divide 171804 by 85
We want to divide 171804 by 85.

Advancing to step 1:
When dividing 1 by 85, we get 0 with 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.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 85

Advancing to step 2:
When dividing 17 by 85, we get 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 85

Going ahead to step 3:
If we divide 171 by 85, we get 2 and a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 170 from 171 to get 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 85

Step 4:
If we divide 18 by 85, we get 0 and a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Deduct 0 from 18 and we're left with 18.
Append the next digit (0) from the dividend to 18 and continue with: 180 / 85

Advancing to step 5:
The number 85 fits into 180 2 times, leaving a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 202.0
Deduct 170 from 180 and we're left with 10.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 85

Moving on to step 6:
If we divide 104 by 85, we get 1 and a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 2021.0
The remainder is 19 after subtracting 85 from 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 7:
If we divide 190 by 85, we get 2 and a remainder of 20.
The next digit of our result is 2. 
Result so far: 2021.2
Subtract 170 from 190 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
85 goes into 200 2 times with a remainder of 30.
Put 2 as the next digit of the answer. 
Result so far: 2021.22
Subtract 170 from 200 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 2021.22 and a remainder of 0.03.