We divide 663989 by 8
Let's see how many times 8 fits into 663989.

On to step 1:
6 divided by 8 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 8

Step 2:
The number 8 fits into 66 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we subtract 64 from 66, we get 2.
Fetch the next digit (3) from the dividend, attach it to 2 and continue: 23 / 8

On to step 3:
When dividing 23 by 8, we get 2 with a remainder of 7.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
Subtracting 16 from 23 leaves us with 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 8

Moving on to step 4:
8 can be fit into 79 9 times, resulting in a remainder of 7.
The next digit of our result is 9. 
Result so far: 829.0
Subtracting 72 from 79 leaves us with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 8

Step 5:
8 can be fit into 78 9 times, resulting in a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 8299.0
If we subtract 72 from 78, we get 6.
Take the next digit (9) from the dividend and append it to 6, then repeat: 69 / 8

Going ahead to step 6:
69 divided by 8 is 8 with a remainder of 5.
The next digit of our result is 8. 
Result so far: 82998.0
Subtracting 64 from 69 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 7:
8 goes into 50 6 times with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 82998.6
If we subtract 48 from 50, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
When dividing 20 by 8, we get 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 82998.62
Deduct 16 from 20 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
8 goes into 40 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 82998.625
Subtracting 40 from 40 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.

Step 10:
If we divide 0 by 8, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 82998.625
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.

On to step 11:
If we divide 0 by 8, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 82998.625
If we subtract 0 from 0, 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.

Our division results in 82998.625 with a remaining 0.0.