We're dividing 789987 by 20 
Let's see how many times 20 fits into 789987.

Step 1:
When dividing 7 by 20, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 20

Advancing to step 2:
20 can be fit into 78 3 times, resulting in a remainder of 18.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 60 away from 78, we end up with 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 20

Step 3:
When dividing 189 by 20, we get 9 with a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 39.0
The remainder is 9 after subtracting 180 from 189.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 20

Let's proceed to step 4:
20 can be fit into 99 4 times, resulting in a remainder of 19.
The number 4 becomes the next digit in our result. 
Result so far: 394.0
If we subtract 80 from 99, we get 19.
Include the next digit (8) from the dividend after 19, then repeat: 198 / 20

Moving on to step 5:
198 divided by 20 is 9 with a remainder of 18.
The next digit of our result is 9. 
Result so far: 3949.0
If we take 180 away from 198, we end up with 18.
Include the next digit (7) from the dividend after 18, then repeat: 187 / 20

Let's proceed to step 6:
20 goes into 187 9 times with a remainder of 7.
Write down 9 as next digit of the result. 
Result so far: 39499.0
Subtract 180 from 187 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
20 goes into 70 3 times with a remainder of 10.
The next digit of our result is 3. 
Result so far: 39499.3
Subtracting 60 from 70 leaves us 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:
When dividing 100 by 20, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 39499.35
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.

Advancing to step 9:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 39499.35
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.

Going ahead to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 39499.35
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.

Our division results in 39499.35 with a remaining 0.0.