639680 divided by 25 
We want to divide 639680 by 25.

Advancing to step 1:
If we divide 6 by 25, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 25

Step 2:
63 divided by 25 is 2 with a remainder of 13.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 50 from 63, we get 13.
Append the next digit (9) from the dividend to 13 and continue with: 139 / 25

Step 3:
If we divide 139 by 25, we get 5 and a remainder of 14.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
If we subtract 125 from 139, we get 14.
Bring next digit (6) of the dividend behind the 14 and repeat the process: 146 / 25

Moving on to step 4:
25 can be fit into 146 5 times, resulting in a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 255.0
Subtracting 125 from 146 leaves us with 21.
Include the next digit (8) from the dividend after 21, then repeat: 218 / 25

Let's proceed to step 5:
218 divided by 25 is 8 with a remainder of 18.
Write down 8 as next digit of the result. 
Result so far: 2558.0
If we take 200 away from 218, we end up with 18.
Include the next digit (0) from the dividend after 18, then repeat: 180 / 25

Advancing to step 6:
25 goes into 180 7 times with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 25587.0
Subtracting 175 from 180 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.

Step 7:
The number 25 fits into 50 2 times, leaving a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 25587.2
The remainder is 0 after subtracting 50 from 50.
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 8:
25 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 25587.2
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.

On to step 9:
25 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: 25587.2
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.

The final result is 25587.2 with a remainder of 0.0.