300396 ÷ 20 
We're looking to find how many times 20 goes into 300396.

Advancing to step 1:
20 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 20

On to step 2:
30 divided by 20 is 1 with a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 10 after subtracting 20 from 30.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 20

Let's proceed to step 3:
100 divided by 20 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 15.0
If we take 100 away from 100, we end up with 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 20

Step 4:
20 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 150.0
Subtract 0 from 3 to get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 20

Let's proceed to step 5:
20 goes into 39 1 times with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1501.0
Subtracting 20 from 39 leaves us with 19.
Fetch the next digit (6) from the dividend, attach it to 19 and continue: 196 / 20

On to step 6:
If we divide 196 by 20, we get 9 and a remainder of 16.
Record the quotient 9 as the next digit in the result. 
Result so far: 15019.0
The remainder is 16 after subtracting 180 from 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
When dividing 160 by 20, we get 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 15019.8
Subtracting 160 from 160 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.

Advancing to step 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 15019.8
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:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 15019.8
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.

Our division results in 15019.8 with a remaining 0.0.