We're dividing 309066 by 20 
We want to figure out the number of times 309066 can be divided by 20.

On to step 1:
When dividing 3 by 20, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 20

Let's proceed to step 2:
The number 20 fits into 30 1 times, leaving a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 20 away from 30, we end up with 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 20

On to step 3:
When dividing 109 by 20, we get 5 with a remainder of 9.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
The remainder is 9 after subtracting 100 from 109.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 20

On to step 4:
When dividing 90 by 20, we get 4 with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 154.0
If we subtract 80 from 90, we get 10.
Append the next digit (6) from the dividend to 10 and continue with: 106 / 20

Moving on to step 5:
When dividing 106 by 20, we get 5 with a remainder of 6.
Write down 5 as next digit of the result. 
Result so far: 1545.0
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

Step 6:
20 goes into 66 3 times with a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 15453.0
The remainder is 6 after subtracting 60 from 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
20 goes into 60 3 times with a remainder of 0.
The next digit of our result is 3. 
Result so far: 15453.3
Subtract 60 from 60 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.

Moving on to step 8:
When dividing 0 by 20, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 15453.3
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.

Advancing to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 15453.3
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.

The final outcome is 15453.3, with a leftover of 0.0.