We're dividing 620985 by 20 
We want to divide 620985 by 20.

Going ahead to step 1:
If we divide 6 by 20, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (2) from the dividend and append it to 6, then repeat: 62 / 20

Going ahead to step 2:
20 can be fit into 62 3 times, resulting in a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 60 from 62 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 20

Let's proceed to step 3:
20 divided by 20 is 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 31.0
Deduct 20 from 20 and we're left with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 20

Step 4:
20 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 310.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 20

Let's proceed to step 5:
When dividing 98 by 20, we get 4 with a remainder of 18.
The next digit of our result is 4. 
Result so far: 3104.0
Subtract 80 from 98 to get 18.
Include the next digit (5) from the dividend after 18, then repeat: 185 / 20

Going ahead to step 6:
The number 20 fits into 185 9 times, leaving a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 31049.0
If we subtract 180 from 185, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
The number 20 fits into 50 2 times, leaving a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 31049.2
Subtract 40 from 50 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:
20 can be fit into 100 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 31049.25
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.

Moving 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: 31049.25
The remainder is 0 after subtracting 0 from 0.
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 10:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 31049.25
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.

After the division, we end up with 31049.25 and a remainder of 0.0.