We're dividing 663820 by 90 
Our goal is to divide 663820 by 90.

Step 1:
When dividing 6 by 90, we get 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 / 90

Advancing to step 2:
90 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Take the next digit (3) from the dividend and append it to 66, then repeat: 663 / 90

Advancing to step 3:
The number 90 fits into 663 7 times, leaving a remainder of 33.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 630 from 663 leaves us with 33.
Include the next digit (8) from the dividend after 33, then repeat: 338 / 90

Going ahead to step 4:
90 goes into 338 3 times with a remainder of 68.
Write down 3 as next digit of the result. 
Result so far: 73.0
The remainder is 68 after subtracting 270 from 338.
Bring next digit (2) of the dividend behind the 68 and repeat the process: 682 / 90

Let's proceed to step 5:
90 can be fit into 682 7 times, resulting in a remainder of 52.
The number 7 becomes the next digit in our result. 
Result so far: 737.0
If we take 630 away from 682, we end up with 52.
Take the next digit (0) from the dividend and append it to 52, then repeat: 520 / 90

Going ahead to step 6:
When dividing 520 by 90, we get 5 with a remainder of 70.
Use 5 as the next digit of our solution. 
Result so far: 7375.0
Subtracting 450 from 520 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 7:
700 divided by 90 is 7 with a remainder of 70.
The next digit of our result is 7. 
Result so far: 7375.7
If we subtract 630 from 700, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
700 divided by 90 is 7 with a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 7375.77
Subtracting 630 from 700 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 7375.77, and the remainder is 0.07.