We look at the division of 644280 by 75 
Let's see how many times 75 fits into 644280.

Advancing to step 1:
75 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 75

Step 2:
75 goes into 64 0 times with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Include the next digit (4) from the dividend after 64, then repeat: 644 / 75

On to step 3:
75 goes into 644 8 times with a remainder of 44.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 600 from 644 leaves us with 44.
Fetch the next digit (2) from the dividend, attach it to 44 and continue: 442 / 75

Advancing to step 4:
When dividing 442 by 75, we get 5 with a remainder of 67.
The next digit of our result is 5. 
Result so far: 85.0
Deduct 375 from 442 and we're left with 67.
Grab the next digit (8) from the dividend, add it to 67, then carry on: 678 / 75

Advancing to step 5:
The number 75 fits into 678 9 times, leaving a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 859.0
Subtracting 675 from 678 leaves us with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 75

Step 6:
75 can be fit into 30 0 times, resulting in a remainder of 30.
The next digit of our result is 0. 
Result so far: 8590.0
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 7:
If we divide 300 by 75, we get 4 and a remainder of 0.
The next digit of our result is 4. 
Result so far: 8590.4
Subtracting 300 from 300 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:
75 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: 8590.4
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 9:
When dividing 0 by 75, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8590.4
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.

Our division results in 8590.4 with a remaining 0.0.