We divide 660504 by 20
We're looking to find how many times 20 goes into 660504.

Step 1:
When dividing 6 by 20, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 20

Step 2:
20 goes into 66 3 times with a remainder of 6.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 60 from 66 and we're left with 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 20

On to step 3:
20 can be fit into 60 3 times, resulting in a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
If we subtract 60 from 60, we get 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 20

Moving on to step 4:
20 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 330.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 20

Advancing to step 5:
The number 20 fits into 50 2 times, leaving a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 3302.0
Subtract 40 from 50 to get 10.
Take the next digit (4) from the dividend and append it to 10, then repeat: 104 / 20

Going ahead to step 6:
The number 20 fits into 104 5 times, leaving a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 33025.0
Subtracting 100 from 104 leaves us 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.

On to step 7:
The number 20 fits into 40 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 33025.2
If we take 40 away from 40, 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.

Advancing to step 8:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 33025.2
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 9:
0 divided by 20 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 33025.2
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.

In conclusion, the division gives 33025.2 with a balance of 0.0.