Let's divide 396090 by 20
We want to divide 396090 by 20.

On to step 1:
20 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 20

On to step 2:
20 goes into 39 1 times with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 20 from 39 leaves us with 19.
Take the next digit (6) from the dividend and append it to 19, then repeat: 196 / 20

Going ahead to step 3:
20 can be fit into 196 9 times, resulting in a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 19.0
The remainder is 16 after subtracting 180 from 196.
Bring next digit (0) of the dividend behind the 16 and repeat the process: 160 / 20

Let's proceed to step 4:
20 goes into 160 8 times with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 198.0
The remainder is 0 after subtracting 160 from 160.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 20

Let's proceed to step 5:
20 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 1980.0
If we subtract 0 from 9, we get 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 20

Advancing to step 6:
90 divided by 20 is 4 with a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 19804.0
The remainder is 10 after subtracting 80 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
If we divide 100 by 20, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 19804.5
Deduct 100 from 100 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.

Let's proceed to step 8:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 19804.5
If we take 0 away from 0, 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.

Let's proceed to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 19804.5
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.

In conclusion, the division gives 19804.5 with a balance of 0.0.