We're dividing 497780 by 20 
Let's see how many times 20 fits into 497780.

Going ahead to step 1:
4 divided by 20 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 20

Advancing to step 2:
The number 20 fits into 49 2 times, leaving a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 40 from 49 to get 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 20

Moving on to step 3:
97 divided by 20 is 4 with a remainder of 17.
Use 4 as the next digit of our solution. 
Result so far: 24.0
If we take 80 away from 97, we end up with 17.
Grab the next digit (7) from the dividend, add it to 17, then carry on: 177 / 20

On to step 4:
When dividing 177 by 20, we get 8 with a remainder of 17.
The number 8 becomes the next digit in our result. 
Result so far: 248.0
Deduct 160 from 177 and we're left with 17.
Include the next digit (8) from the dividend after 17, then repeat: 178 / 20

Going ahead to step 5:
20 can be fit into 178 8 times, resulting in a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 2488.0
Deduct 160 from 178 and we're left with 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 20

On to step 6:
20 goes into 180 9 times with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 24889.0
Deduct 180 from 180 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.

Going ahead to step 7:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 24889.0
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.

Moving on to step 8:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 24889.0
If we subtract 0 from 0, we 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.

Our division results in 24889.0 with a remaining 0.0.