Let's divide 663681 by 1
Let's see how many times 1 fits into 663681.

Going ahead to step 1:
The number 1 fits into 6 6 times, leaving a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Deduct 6 from 6 and we're left with 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 1

Let's proceed to step 2:
The number 1 fits into 6 6 times, leaving a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 66.0
The remainder is 0 after subtracting 6 from 6.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 1

Advancing to step 3:
1 can be fit into 3 3 times, resulting in a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 663.0
Deduct 3 from 3 and we're left with 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 1

On to step 4:
6 divided by 1 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 6636.0
If we subtract 6 from 6, we get 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 1

Advancing to step 5:
When dividing 8 by 1, we get 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 66368.0
If we subtract 8 from 8, we get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 1

Moving on to step 6:
When dividing 1 by 1, we get 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 663681.0
Subtract 1 from 1 to 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.

Going ahead to step 7:
1 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 663681.0
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.

Step 8:
1 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 663681.0
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 quotient of the division is 663681.0, and the remainder is 0.0.