We look at the division of 170911 by 20 
We want to figure out the number of times 170911 can be divided by 20.

Step 1:
The number 20 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 20

Step 2:
17 divided by 20 is 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 17, we end up with 17.
Fetch the next digit (0) from the dividend, attach it to 17 and continue: 170 / 20

Advancing to step 3:
When dividing 170 by 20, we get 8 with a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 160 from 170 and we're left with 10.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 20

Advancing to step 4:
20 goes into 109 5 times with a remainder of 9.
Write down 5 as next digit of the result. 
Result so far: 85.0
If we take 100 away from 109, we end up with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 20

Advancing to step 5:
20 goes into 91 4 times with a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 854.0
Subtract 80 from 91 to get 11.
Fetch the next digit (1) from the dividend, attach it to 11 and continue: 111 / 20

Advancing to step 6:
When dividing 111 by 20, we get 5 with a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 8545.0
Subtracting 100 from 111 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
The number 20 fits into 110 5 times, leaving a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 8545.5
Subtract 100 from 110 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 8545.55
If we take 100 away from 100, 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.

In conclusion, the division gives 8545.55 with a balance of 0.0.