We look at the division of 398940 by 20 
Our goal is to divide 398940 by 20.

Advancing to step 1:
20 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 20

Let's proceed to step 2:
39 divided by 20 is 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 1.0
If we take 20 away from 39, we end up with 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 20

Advancing to step 3:
When dividing 198 by 20, we get 9 with a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we take 180 away from 198, we end up with 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 20

Let's proceed to step 4:
20 can be fit into 189 9 times, resulting in a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 199.0
Subtracting 180 from 189 leaves us with 9.
Include the next digit (4) from the dividend after 9, then repeat: 94 / 20

Step 5:
20 goes into 94 4 times with a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 1994.0
Subtracting 80 from 94 leaves us with 14.
Append the next digit (0) from the dividend to 14 and continue with: 140 / 20

Advancing to step 6:
20 goes into 140 7 times with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 19947.0
Deduct 140 from 140 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.

Let's proceed to step 7:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 19947.0
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.

Advancing to step 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 19947.0
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 19947.0 and a remainder of 0.0.