We're dividing 28989328 by 640 
Let's see how many times 640 fits into 28989328.

Step 1:
If we divide 2 by 640, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 640

Going ahead to step 2:
When dividing 28 by 640, we get 0 with a remainder of 28.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Fetch the next digit (9) from the dividend, attach it to 28 and continue: 289 / 640

On to step 3:
The number 640 fits into 289 0 times, leaving a remainder of 289.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 289, we get 289.
Grab the next digit (8) from the dividend, add it to 289, then carry on: 2898 / 640

Moving on to step 4:
If we divide 2898 by 640, we get 4 and a remainder of 338.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 338 after subtracting 2560 from 2898.
Take the next digit (9) from the dividend and append it to 338, then repeat: 3389 / 640

On to step 5:
640 can be fit into 3389 5 times, resulting in a remainder of 189.
Put 5 as the next digit of the answer. 
Result so far: 45.0
The remainder is 189 after subtracting 3200 from 3389.
Grab the next digit (3) from the dividend, add it to 189, then carry on: 1893 / 640

On to step 6:
640 can be fit into 1893 2 times, resulting in a remainder of 613.
Put 2 as the next digit of the answer. 
Result so far: 452.0
Deduct 1280 from 1893 and we're left with 613.
Grab the next digit (2) from the dividend, add it to 613, then carry on: 6132 / 640

Step 7:
When dividing 6132 by 640, we get 9 with a remainder of 372.
Record the quotient 9 as the next digit in the result. 
Result so far: 4529.0
The remainder is 372 after subtracting 5760 from 6132.
Append the next digit (8) from the dividend to 372 and continue with: 3728 / 640

Moving on to step 8:
640 can be fit into 3728 5 times, resulting in a remainder of 528.
Use 5 as the next digit of our solution. 
Result so far: 45295.0
If we subtract 3200 from 3728, we get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

Moving on to step 9:
If we divide 5280 by 640, we get 8 and a remainder of 160.
Put 8 as the next digit of the answer. 
Result so far: 45295.8
If we subtract 5120 from 5280, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 10:
640 goes into 1600 2 times with a remainder of 320.
Write down 2 as next digit of the result. 
Result so far: 45295.82
The remainder is 320 after subtracting 1280 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 11:
640 can be fit into 3200 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 45295.825
Deduct 3200 from 3200 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.

On to step 12:
When dividing 0 by 640, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 45295.825
Subtracting 0 from 0 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.

Moving on to step 13:
If we divide 0 by 640, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 45295.825
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.

The final result is 45295.825 with a remainder of 0.0.