We're dividing 306663 by 20 
We're looking to find how many times 20 goes into 306663.

Going ahead to step 1:
If we divide 3 by 20, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 20

Advancing to step 2:
20 goes into 30 1 times with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 20 from 30 and we're left with 10.
Include the next digit (6) from the dividend after 10, then repeat: 106 / 20

Let's proceed to step 3:
When dividing 106 by 20, we get 5 with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we take 100 away from 106, we end up with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 20

On to step 4:
When dividing 66 by 20, we get 3 with a remainder of 6.
The next digit of our result is 3. 
Result so far: 153.0
Deduct 60 from 66 and we're left with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 20

Let's proceed to step 5:
The number 20 fits into 66 3 times, leaving a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 1533.0
Subtracting 60 from 66 leaves us with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 20

On to step 6:
63 divided by 20 is 3 with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 15333.0
Deduct 60 from 63 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
20 can be fit into 30 1 times, resulting in a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 15333.1
The remainder is 10 after subtracting 20 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
20 goes into 100 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 15333.15
Subtracting 100 from 100 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 9:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 15333.15
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.

Advancing to step 10:
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: 15333.15
Subtracting 0 from 0 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.

In conclusion, the division gives 15333.15 with a balance of 0.0.