We're dividing 431317 by 20 
Let's see how many times 20 fits into 431317.

Going ahead to step 1:
The number 20 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 20

Step 2:
20 can be fit into 43 2 times, resulting in a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 40 away from 43, we end up with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 20

Going ahead to step 3:
When dividing 31 by 20, we get 1 with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Deduct 20 from 31 and we're left with 11.
Include the next digit (3) from the dividend after 11, then repeat: 113 / 20

Step 4:
When dividing 113 by 20, we get 5 with a remainder of 13.
The number 5 becomes the next digit in our result. 
Result so far: 215.0
Deduct 100 from 113 and we're left with 13.
Append the next digit (1) from the dividend to 13 and continue with: 131 / 20

On to step 5:
If we divide 131 by 20, we get 6 and a remainder of 11.
Use 6 as the next digit of our solution. 
Result so far: 2156.0
If we subtract 120 from 131, we get 11.
Bring next digit (7) of the dividend behind the 11 and repeat the process: 117 / 20

Advancing to step 6:
20 goes into 117 5 times with a remainder of 17.
Write down 5 as next digit of the result. 
Result so far: 21565.0
Subtracting 100 from 117 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 7:
When dividing 170 by 20, we get 8 with a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 21565.8
If we take 160 away from 170, we end up with 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:
20 goes into 100 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 21565.85
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:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 21565.85
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.

Step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 21565.85
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.

After the division, we end up with 21565.85 and a remainder of 0.0.