809634 ÷ 20 
We want to figure out the number of times 809634 can be divided by 20.

Let's proceed to step 1:
The number 20 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 20

Going ahead to step 2:
The number 20 fits into 80 4 times, leaving a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 0 after subtracting 80 from 80.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 20

Advancing to step 3:
The number 20 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
If we take 0 away from 9, we end up with 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 20

Advancing to step 4:
20 goes into 96 4 times with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 404.0
Deduct 80 from 96 and we're left with 16.
Grab the next digit (3) from the dividend, add it to 16, then carry on: 163 / 20

Going ahead to step 5:
20 goes into 163 8 times with a remainder of 3.
Write down 8 as next digit of the result. 
Result so far: 4048.0
Subtracting 160 from 163 leaves us with 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 20

Step 6:
If we divide 34 by 20, we get 1 and a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 40481.0
If we subtract 20 from 34, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 7:
When dividing 140 by 20, we get 7 with a remainder of 0.
The next digit of our result is 7. 
Result so far: 40481.7
The remainder is 0 after subtracting 140 from 140.
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 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 40481.7
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.

On to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 40481.7
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 40481.7 with a remainder of 0.0.