We look at the division of 398103 by 20 
Our goal is to divide 398103 by 20.

On to step 1:
If we divide 3 by 20, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 20

Going ahead to step 2:
20 can be fit into 39 1 times, resulting in a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 19 after subtracting 20 from 39.
Take the next digit (8) from the dividend and append it to 19, then repeat: 198 / 20

Going ahead to step 3:
20 can be fit into 198 9 times, resulting in a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 19.0
Subtracting 180 from 198 leaves us with 18.
Grab the next digit (1) from the dividend, add it to 18, then carry on: 181 / 20

Advancing to step 4:
20 can be fit into 181 9 times, resulting in a remainder of 1.
The next digit of our result is 9. 
Result so far: 199.0
If we subtract 180 from 181, we get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 20

Step 5:
20 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 1990.0
Subtract 0 from 10 to get 10.
Grab the next digit (3) from the dividend, add it to 10, then carry on: 103 / 20

Moving on to step 6:
When dividing 103 by 20, we get 5 with a remainder of 3.
Put 5 as the next digit of the answer. 
Result so far: 19905.0
If we subtract 100 from 103, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
When dividing 30 by 20, we get 1 with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 19905.1
Deduct 20 from 30 and we're left 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.

Moving on to step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 19905.15
Deduct 100 from 100 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.

Going ahead to step 9:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 19905.15
Subtract 0 from 0 to 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.

Let's proceed to step 10:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 19905.15
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 19905.15 and a remainder of 0.0.