Let's divide 176991 by 20
We're looking to find how many times 20 goes into 176991.

On to step 1:
The number 20 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 20

On to step 2:
The number 20 fits into 17 0 times, leaving a remainder of 17.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Take the next digit (6) from the dividend and append it to 17, then repeat: 176 / 20

On to step 3:
20 can be fit into 176 8 times, resulting in a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 8.0
Deduct 160 from 176 and we're left with 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 20

Advancing to step 4:
20 can be fit into 169 8 times, resulting in a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 88.0
The remainder is 9 after subtracting 160 from 169.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 20

Step 5:
The number 20 fits into 99 4 times, leaving a remainder of 19.
The next digit of our result is 4. 
Result so far: 884.0
Deduct 80 from 99 and we're left with 19.
Grab the next digit (1) from the dividend, add it to 19, then carry on: 191 / 20

Moving on to step 6:
20 can be fit into 191 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 8849.0
If we take 180 away from 191, we end up 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:
If we divide 110 by 20, we get 5 and a remainder of 10.
The next digit of our result is 5. 
Result so far: 8849.5
If we take 100 away from 110, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 8849.55
If we subtract 100 from 100, 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.

After the division, we end up with 8849.55 and a remainder of 0.0.