We look at the division of 644320 by 5 
Let's see how many times 5 fits into 644320.

On to step 1:
If we divide 6 by 5, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 5 from 6 and we're left with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 5

Going ahead to step 2:
The number 5 fits into 14 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 10 from 14, we get 4.
Fetch the next digit (4) from the dividend, attach it to 4 and continue: 44 / 5

On to step 3:
The number 5 fits into 44 8 times, leaving a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 128.0
If we take 40 away from 44, we end up with 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 5

Going ahead to step 4:
5 can be fit into 43 8 times, resulting in a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 1288.0
Subtract 40 from 43 to get 3.
Append the next digit (2) from the dividend to 3 and continue with: 32 / 5

Let's proceed to step 5:
5 goes into 32 6 times with a remainder of 2.
The next digit of our result is 6. 
Result so far: 12886.0
Subtracting 30 from 32 leaves us with 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 5

Going ahead to step 6:
If we divide 20 by 5, we get 4 and a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 128864.0
If we subtract 20 from 20, 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.

Moving on to step 7:
0 divided by 5 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 128864.0
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 8:
0 divided by 5 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 128864.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 128864.0 with a balance of 0.0.