We're dividing 800987 by 20 
We want to figure out the number of times 800987 can be divided by 20.

Advancing to step 1:
8 divided by 20 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 20

Going ahead to step 2:
When dividing 80 by 20, we get 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 80 from 80, we get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 20

Advancing to step 3:
0 divided by 20 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 40.0
If we take 0 away from 0, we end up with 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 20

Moving on to step 4:
The number 20 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 400.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 20

Let's proceed to step 5:
The number 20 fits into 98 4 times, leaving a remainder of 18.
The number 4 becomes the next digit in our result. 
Result so far: 4004.0
Subtract 80 from 98 to get 18.
Include the next digit (7) from the dividend after 18, then repeat: 187 / 20

Advancing to step 6:
20 goes into 187 9 times with a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 40049.0
Subtracting 180 from 187 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
The number 20 fits into 70 3 times, leaving a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 40049.3
If we take 60 away from 70, we end up 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:
20 goes into 100 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 40049.35
If we subtract 100 from 100, 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.

Let's proceed to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 40049.35
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: 40049.35
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.

After the division, we end up with 40049.35 and a remainder of 0.0.