820187 divided by 20 
We're looking to find how many times 20 goes into 820187.

Let's proceed to step 1:
The number 20 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
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

Advancing to step 2:
The number 20 fits into 82 4 times, leaving a remainder of 2.
The next digit of our result is 4. 
Result so far: 4.0
If we take 80 away from 82, we end up with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 20

Let's proceed to step 3:
If we divide 20 by 20, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 41.0
Deduct 20 from 20 and we're left with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 20

Moving on to step 4:
20 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 410.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 20

Step 5:
20 can be fit into 18 0 times, resulting in a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 4100.0
Subtract 0 from 18 to get 18.
Bring next digit (7) of the dividend behind the 18 and repeat the process: 187 / 20

On to step 6:
187 divided by 20 is 9 with a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 41009.0
The remainder is 7 after subtracting 180 from 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
20 goes into 70 3 times with a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 41009.3
If we subtract 60 from 70, we 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.

Going ahead to step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 41009.35
The remainder is 0 after subtracting 100 from 100.
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:
If we divide 0 by 20, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 41009.35
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.

Moving on to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 41009.35
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.

The final result is 41009.35 with a remainder of 0.0.