We're dividing 644268 by 20 
We want to figure out the number of times 644268 can be divided by 20.

Advancing to step 1:
20 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 20

Step 2:
The number 20 fits into 64 3 times, leaving a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 60 from 64 and we're left with 4.
Grab the next digit (4) from the dividend, add it to 4, then carry on: 44 / 20

Advancing to step 3:
When dividing 44 by 20, we get 2 with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 32.0
Deduct 40 from 44 and we're left with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 20

Let's proceed to step 4:
When dividing 42 by 20, we get 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 322.0
The remainder is 2 after subtracting 40 from 42.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 20

On to step 5:
20 can be fit into 26 1 times, resulting in a remainder of 6.
The next digit of our result is 1. 
Result so far: 3221.0
Subtract 20 from 26 to get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 20

Going ahead to step 6:
20 can be fit into 68 3 times, resulting in a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 32213.0
The remainder is 8 after subtracting 60 from 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 7:
When dividing 80 by 20, we get 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 32213.4
Subtracting 80 from 80 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.

Let's proceed to step 8:
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: 32213.4
Subtract 0 from 0 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.

Let's proceed to step 9:
0 divided by 20 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 32213.4
Subtract 0 from 0 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.

Our division results in 32213.4 with a remaining 0.0.