We divide 403440 by 20
Our goal is to divide 403440 by 20.

Let's proceed to step 1:
20 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 20

Going ahead to step 2:
20 goes into 40 2 times with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 40 from 40, we get 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 20

Advancing to step 3:
When dividing 3 by 20, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 20

Moving on to step 4:
20 can be fit into 34 1 times, resulting in a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 201.0
Deduct 20 from 34 and we're left with 14.
Append the next digit (4) from the dividend to 14 and continue with: 144 / 20

Going ahead to step 5:
144 divided by 20 is 7 with a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 2017.0
If we take 140 away from 144, we end up with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 20

Step 6:
If we divide 40 by 20, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 20172.0
Deduct 40 from 40 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 7:
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: 20172.0
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.

On to step 8:
If we divide 0 by 20, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20172.0
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.

In conclusion, the division gives 20172.0 with a balance of 0.0.