413391 ÷ 20 
We want to divide 413391 by 20.

On to step 1:
If we divide 4 by 20, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 20

Advancing to step 2:
The number 20 fits into 41 2 times, leaving a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 1 after subtracting 40 from 41.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 20

Going ahead to step 3:
The number 20 fits into 13 0 times, leaving a remainder of 13.
The next digit of our result is 0. 
Result so far: 20.0
The remainder is 13 after subtracting 0 from 13.
Take the next digit (3) from the dividend and append it to 13, then repeat: 133 / 20

On to step 4:
133 divided by 20 is 6 with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 206.0
If we subtract 120 from 133, we get 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 20

Step 5:
20 goes into 139 6 times with a remainder of 19.
The number 6 becomes the next digit in our result. 
Result so far: 2066.0
If we subtract 120 from 139, we get 19.
Bring next digit (1) of the dividend behind the 19 and repeat the process: 191 / 20

Going ahead to step 6:
The number 20 fits into 191 9 times, leaving a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 20669.0
Subtracting 180 from 191 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
When dividing 110 by 20, we get 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 20669.5
If we subtract 100 from 110, 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.

On to step 8:
100 divided by 20 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 20669.55
If we take 100 away from 100, 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.

Our division results in 20669.55 with a remaining 0.0.