808393 ÷ 20 
Our goal is to divide 808393 by 20.

On to step 1:
If we divide 8 by 20, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 20

Step 2:
20 can be fit into 80 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 0 after subtracting 80 from 80.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 20

Advancing to step 3:
When dividing 8 by 20, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 40.0
If we subtract 0 from 8, we get 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 20

Step 4:
The number 20 fits into 83 4 times, leaving a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 404.0
The remainder is 3 after subtracting 80 from 83.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 20

Moving on to step 5:
The number 20 fits into 39 1 times, leaving a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 4041.0
Subtract 20 from 39 to get 19.
Fetch the next digit (3) from the dividend, attach it to 19 and continue: 193 / 20

Let's proceed to step 6:
If we divide 193 by 20, we get 9 and a remainder of 13.
Put 9 as the next digit of the answer. 
Result so far: 40419.0
The remainder is 13 after subtracting 180 from 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
When dividing 130 by 20, we get 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 40419.6
The remainder is 10 after subtracting 120 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
20 goes into 100 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 40419.65
If we take 100 away from 100, 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.

Moving on to step 9:
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: 40419.65
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 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: 40419.65
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.

The final result is 40419.65 with a remainder of 0.0.