We look at the division of 18173 by 20 
We want to figure out the number of times 18173 can be divided by 20.

Let's proceed to step 1:
20 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 20

On to step 2:
The number 20 fits into 18 0 times, leaving a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Bring next digit (1) of the dividend behind the 18 and repeat the process: 181 / 20

Step 3:
If we divide 181 by 20, we get 9 and a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 180 from 181 to get 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 20

Moving on to step 4:
When dividing 17 by 20, we get 0 with a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
The remainder is 17 after subtracting 0 from 17.
Grab the next digit (3) from the dividend, add it to 17, then carry on: 173 / 20

Advancing to step 5:
If we divide 173 by 20, we get 8 and a remainder of 13.
Record the quotient 8 as the next digit in the result. 
Result so far: 908.0
If we subtract 160 from 173, 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.

Going ahead to step 6:
If we divide 130 by 20, we get 6 and a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 908.6
Deduct 120 from 130 and we're left 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 7:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 908.65
Deduct 100 from 100 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.

On to step 8:
When dividing 0 by 20, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 908.65
The remainder is 0 after subtracting 0 from 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 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 908.65
Subtracting 0 from 0 leaves us 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.

Our division results in 908.65 with a remaining 0.0.