We're dividing 797985 by 20 
Let's see how many times 20 fits into 797985.

Step 1:
20 can be fit into 7 0 times, resulting in a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 20

Going ahead to step 2:
20 can be fit into 79 3 times, resulting in a remainder of 19.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 60 from 79 leaves us with 19.
Grab the next digit (7) from the dividend, add it to 19, then carry on: 197 / 20

Moving on to step 3:
The number 20 fits into 197 9 times, leaving a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
Subtract 180 from 197 to get 17.
Grab the next digit (9) from the dividend, add it to 17, then carry on: 179 / 20

Let's proceed to step 4:
If we divide 179 by 20, we get 8 and a remainder of 19.
The next digit of our result is 8. 
Result so far: 398.0
Subtract 160 from 179 to get 19.
Bring next digit (8) of the dividend behind the 19 and repeat the process: 198 / 20

Moving on to step 5:
20 goes into 198 9 times with a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 3989.0
If we take 180 away from 198, we end up with 18.
Append the next digit (5) from the dividend to 18 and continue with: 185 / 20

Let's proceed to step 6:
185 divided by 20 is 9 with a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 39899.0
Deduct 180 from 185 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
20 goes into 50 2 times with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 39899.2
The remainder is 10 after subtracting 40 from 50.
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:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 39899.25
Subtract 100 from 100 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.

Step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 39899.25
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.

Moving on to step 10:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 39899.25
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.

The final result is 39899.25 with a remainder of 0.0.