We're dividing 640785 by 25 
We want to divide 640785 by 25.

Moving on to step 1:
25 goes into 6 0 times 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.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 25

On to step 2:
The number 25 fits into 64 2 times, leaving a remainder of 14.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 50 from 64 and we're left with 14.
Include the next digit (0) from the dividend after 14, then repeat: 140 / 25

Going ahead to step 3:
25 goes into 140 5 times with a remainder of 15.
The next digit of our result is 5. 
Result so far: 25.0
Deduct 125 from 140 and we're left with 15.
Grab the next digit (7) from the dividend, add it to 15, then carry on: 157 / 25

Let's proceed to step 4:
25 can be fit into 157 6 times, resulting in a remainder of 7.
The next digit of our result is 6. 
Result so far: 256.0
If we take 150 away from 157, we end up with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 25

Let's proceed to step 5:
When dividing 78 by 25, we get 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 2563.0
Subtracting 75 from 78 leaves us with 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 25

Moving on to step 6:
If we divide 35 by 25, we get 1 and a remainder of 10.
The next digit of our result is 1. 
Result so far: 25631.0
Subtract 25 from 35 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
The number 25 fits into 100 4 times, leaving a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 25631.4
Subtracting 100 from 100 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.

Step 8:
0 divided by 25 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 25631.4
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.

Moving on to step 9:
If we divide 0 by 25, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 25631.4
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.

The final result is 25631.4 with a remainder of 0.0.