We divide 808123 by 20
Let's see how many times 20 fits into 808123.

Step 1:
When dividing 8 by 20, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 20

Let's proceed to step 2:
20 goes into 80 4 times with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 80 from 80 and we're left with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 20

Going ahead to step 3:
8 divided by 20 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 40.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 20

Advancing to step 4:
20 goes into 81 4 times with a remainder of 1.
The next digit of our result is 4. 
Result so far: 404.0
If we subtract 80 from 81, we get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 20

On to step 5:
If we divide 12 by 20, we get 0 and a remainder of 12.
The next digit of our result is 0. 
Result so far: 4040.0
Subtract 0 from 12 to get 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 20

Going ahead to step 6:
If we divide 123 by 20, we get 6 and a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 40406.0
If we take 120 away from 123, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
The number 20 fits into 30 1 times, leaving a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 40406.1
Subtract 20 from 30 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.

Advancing to step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 40406.15
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.

Let's proceed to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 40406.15
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.

On to step 10:
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: 40406.15
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.

Our division results in 40406.15 with a remaining 0.0.