817623 divided by 18 
Let's see how many times 18 fits into 817623.

On to step 1:
18 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 18

Step 2:
If we divide 81 by 18, we get 4 and a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 9 after subtracting 72 from 81.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 18

Moving on to step 3:
97 divided by 18 is 5 with a remainder of 7.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
Subtracting 90 from 97 leaves us with 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 18

Let's proceed to step 4:
18 can be fit into 76 4 times, resulting in a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 454.0
Subtracting 72 from 76 leaves us with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 18

Moving on to step 5:
18 can be fit into 42 2 times, resulting in a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 4542.0
Subtract 36 from 42 to get 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 18

On to step 6:
18 can be fit into 63 3 times, resulting in a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 45423.0
The remainder is 9 after subtracting 54 from 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
When dividing 90 by 18, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 45423.5
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
0 divided by 18 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 45423.5
If we take 0 away from 0, 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.

Moving on to step 9:
The number 18 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 45423.5
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.

The final result is 45423.5 with a remainder of 0.0.