809388 ÷ 20 
We want to figure out the number of times 809388 can be divided by 20.

Going ahead to step 1:
20 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 20

Advancing to step 2:
When dividing 80 by 20, we get 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 4.0
The remainder is 0 after subtracting 80 from 80.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 20

Going ahead to step 3:
The number 20 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 20

Advancing to step 4:
When dividing 93 by 20, we get 4 with a remainder of 13.
Put 4 as the next digit of the answer. 
Result so far: 404.0
Deduct 80 from 93 and we're left with 13.
Fetch the next digit (8) from the dividend, attach it to 13 and continue: 138 / 20

Step 5:
138 divided by 20 is 6 with a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 4046.0
Subtracting 120 from 138 leaves us with 18.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 20

Advancing to step 6:
The number 20 fits into 188 9 times, leaving a remainder of 8.
The number 9 becomes the next digit in our result. 
Result so far: 40469.0
If we subtract 180 from 188, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
20 can be fit into 80 4 times, resulting in a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 40469.4
If we subtract 80 from 80, 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 8:
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: 40469.4
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.

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: 40469.4
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.

The quotient of the division is 40469.4, and the remainder is 0.0.