We're dividing 419808 by 20 
Let's see how many times 20 fits into 419808.

Going ahead to step 1:
If we divide 4 by 20, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 20

Moving on to step 2:
The number 20 fits into 41 2 times, leaving a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 40 away from 41, we end up with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 20

Going ahead to step 3:
The number 20 fits into 19 0 times, leaving a remainder of 19.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we take 0 away from 19, we end up with 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 20

Advancing to step 4:
198 divided by 20 is 9 with a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 209.0
The remainder is 18 after subtracting 180 from 198.
Append the next digit (0) from the dividend to 18 and continue with: 180 / 20

Let's proceed to step 5:
When dividing 180 by 20, we get 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 2099.0
The remainder is 0 after subtracting 180 from 180.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 20

Moving on to step 6:
When dividing 8 by 20, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 20990.0
The remainder is 8 after subtracting 0 from 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
20 can be fit into 80 4 times, resulting in a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 20990.4
Deduct 80 from 80 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.

Moving on to step 8:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20990.4
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.

Advancing to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 20990.4
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.

The final outcome is 20990.4, with a leftover of 0.0.