We divide 998355 by 20
We want to figure out the number of times 998355 can be divided by 20.

Advancing to step 1:
9 divided by 20 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 20

Advancing to step 2:
If we divide 99 by 20, we get 4 and a remainder of 19.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 80 from 99 leaves us with 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 20

Step 3:
20 can be fit into 198 9 times, resulting in a remainder of 18.
The next digit of our result is 9. 
Result so far: 49.0
Deduct 180 from 198 and we're left with 18.
Bring next digit (3) of the dividend behind the 18 and repeat the process: 183 / 20

Let's proceed to step 4:
The number 20 fits into 183 9 times, leaving a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 499.0
The remainder is 3 after subtracting 180 from 183.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 20

Moving on to step 5:
20 can be fit into 35 1 times, resulting in a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 4991.0
If we subtract 20 from 35, we get 15.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 20

Advancing to step 6:
When dividing 155 by 20, we get 7 with a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 49917.0
If we subtract 140 from 155, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
The number 20 fits into 150 7 times, leaving a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 49917.7
If we subtract 140 from 150, 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.
The next digit of our result is 5. 
Result so far: 49917.75
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.

Going ahead to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 49917.75
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 10:
20 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 49917.75
Subtracting 0 from 0 leaves us 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.

The final result is 49917.75 with a remainder of 0.0.