640763 ÷ 25 
Our goal is to divide 640763 by 25.

Let's proceed to step 1:
When dividing 6 by 25, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 25

Going ahead to step 2:
25 goes into 64 2 times with a remainder of 14.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 50 from 64 to get 14.
Grab the next digit (0) from the dividend, add it to 14, then carry on: 140 / 25

Moving on to step 3:
25 can be fit into 140 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
If we subtract 125 from 140, we get 15.
Include the next digit (7) from the dividend after 15, then repeat: 157 / 25

On to step 4:
25 can be fit into 157 6 times, resulting in a remainder of 7.
Use 6 as the next digit of our solution. 
Result so far: 256.0
If we take 150 away from 157, we end up with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 25

Moving on to step 5:
25 can be fit into 76 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 2563.0
If we take 75 away from 76, we end up with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 25

Let's proceed to step 6:
13 divided by 25 is 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 25630.0
Subtracting 0 from 13 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 7:
If we divide 130 by 25, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 25630.5
If we take 125 away from 130, we end up 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.

Let's proceed to step 8:
The number 25 fits into 50 2 times, leaving a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 25630.52
Subtract 50 from 50 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.

Moving on to step 9:
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: 25630.52
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.

On to step 10:
25 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 25630.52
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.

The final outcome is 25630.52, with a leftover of 0.0.