We divide 491809 by 20
Our goal is to divide 491809 by 20.

Let's proceed to step 1:
If we divide 4 by 20, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 20

Going ahead to step 2:
20 goes into 49 2 times with a remainder of 9.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 40 from 49, we get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 20

Advancing to step 3:
The number 20 fits into 91 4 times, leaving a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 24.0
Deduct 80 from 91 and we're left with 11.
Grab the next digit (8) from the dividend, add it to 11, then carry on: 118 / 20

Advancing to step 4:
If we divide 118 by 20, we get 5 and a remainder of 18.
The next digit of our result is 5. 
Result so far: 245.0
If we subtract 100 from 118, we get 18.
Include the next digit (0) from the dividend after 18, then repeat: 180 / 20

Step 5:
180 divided by 20 is 9 with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 2459.0
If we take 180 away from 180, we end up with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 20

Step 6:
9 divided by 20 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 24590.0
If we take 0 away from 9, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
When dividing 90 by 20, we get 4 with a remainder of 10.
The next digit of our result is 4. 
Result so far: 24590.4
Deduct 80 from 90 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.

Going ahead to step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 24590.45
Subtract 100 from 100 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.

Advancing to step 9:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 24590.45
If we take 0 away from 0, 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.

Going ahead to step 10:
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: 24590.45
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.

After the division, we end up with 24590.45 and a remainder of 0.0.