We're dividing 406003 by 20 
Let's see how many times 20 fits into 406003.

Let's proceed to step 1:
If we divide 4 by 20, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 20

Moving on to step 2:
40 divided by 20 is 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 40 from 40 and we're left with 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 20

Advancing to step 3:
20 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (0) from the dividend after 6, then repeat: 60 / 20

Advancing to step 4:
20 can be fit into 60 3 times, resulting in a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 203.0
If we take 60 away from 60, we end up with 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 20

Step 5:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 2030.0
Deduct 0 from 0 and we're left with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 20

Going ahead to step 6:
3 divided by 20 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 20300.0
Subtracting 0 from 3 leaves us 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.

Going ahead to step 7:
30 divided by 20 is 1 with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 20300.1
Deduct 20 from 30 and we're left with 10.
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 can be fit into 100 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 20300.15
The remainder is 0 after subtracting 100 from 100.
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:
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: 20300.15
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.

On to step 10:
When dividing 0 by 20, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 20300.15
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.

In conclusion, the division gives 20300.15 with a balance of 0.0.