We divide 809457 by 20
We want to figure out the number of times 809457 can be divided by 20.

Advancing to step 1:
The number 20 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 20

Going ahead to step 2:
80 divided by 20 is 4 with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 80 from 80 leaves us with 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 20

Let's proceed to step 3:
9 divided by 20 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 40.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (4) from the dividend, attach it to 9 and continue: 94 / 20

Moving on to step 4:
When dividing 94 by 20, we get 4 with a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 404.0
Subtract 80 from 94 to get 14.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 20

Step 5:
20 can be fit into 145 7 times, resulting in a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 4047.0
If we subtract 140 from 145, we get 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 20

Going ahead to step 6:
20 can be fit into 57 2 times, resulting in a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 40472.0
If we subtract 40 from 57, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
The number 20 fits into 170 8 times, leaving a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 40472.8
Subtract 160 from 170 to get 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:
100 divided by 20 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 40472.85
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.

Step 9:
0 divided by 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 40472.85
Subtract 0 from 0 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.

Going ahead to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 40472.85
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 40472.85 with a balance of 0.0.