820810 ÷ 20 
Our goal is to divide 820810 by 20.

Moving on to step 1:
If we divide 8 by 20, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 20

Going ahead to step 2:
The number 20 fits into 82 4 times, leaving a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 80 from 82, we get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 20

Advancing to step 3:
20 goes into 20 1 times with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 41.0
If we subtract 20 from 20, we get 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 20

Step 4:
The number 20 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 410.0
Subtract 0 from 8 to get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 20

Going ahead to step 5:
If we divide 81 by 20, we get 4 and a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 4104.0
If we take 80 away from 81, we end up with 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 20

Let's proceed to step 6:
10 divided by 20 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 41040.0
Subtract 0 from 10 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.

Step 7:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 41040.5
Subtracting 100 from 100 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.

On to step 8:
If we divide 0 by 20, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 41040.5
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 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 41040.5
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.

After the division, we end up with 41040.5 and a remainder of 0.0.