We're dividing 86364885 by 20 
Our goal is to divide 86364885 by 20.

Going ahead to step 1:
20 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 20

Moving on to step 2:
If we divide 86 by 20, we get 4 and a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 80 from 86 leaves us with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 20

Let's proceed to step 3:
20 goes into 63 3 times with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Deduct 60 from 63 and we're left with 3.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 20

Moving on to step 4:
If we divide 36 by 20, we get 1 and a remainder of 16.
The next digit of our result is 1. 
Result so far: 431.0
Subtracting 20 from 36 leaves us with 16.
Include the next digit (4) from the dividend after 16, then repeat: 164 / 20

Moving on to step 5:
The number 20 fits into 164 8 times, leaving a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 4318.0
Subtracting 160 from 164 leaves us with 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 20

Moving on to step 6:
If we divide 48 by 20, we get 2 and a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 43182.0
Deduct 40 from 48 and we're left with 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 20

On to step 7:
88 divided by 20 is 4 with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 431824.0
Deduct 80 from 88 and we're left with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 20

Step 8:
If we divide 85 by 20, we get 4 and a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 4318244.0
Subtracting 80 from 85 leaves us 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.

Moving on to step 9:
20 can be fit into 50 2 times, resulting in a remainder of 10.
The next digit of our result is 2. 
Result so far: 4318244.2
If we take 40 away from 50, 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.

Advancing to step 10:
20 goes into 100 5 times with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 4318244.25
Subtracting 100 from 100 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.

Step 11:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4318244.25
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.

Going ahead to step 12:
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: 4318244.25
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.

After the division, we end up with 4318244.25 and a remainder of 0.0.