640223 ÷ 25 
We want to figure out the number of times 640223 can be divided by 25.

Advancing to step 1:
6 divided by 25 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 25

Advancing to step 2:
The number 25 fits into 64 2 times, leaving a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 50 from 64 to get 14.
Bring next digit (0) of the dividend behind the 14 and repeat the process: 140 / 25

On to step 3:
If we divide 140 by 25, we get 5 and a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Deduct 125 from 140 and we're left with 15.
Take the next digit (2) from the dividend and append it to 15, then repeat: 152 / 25

Step 4:
25 goes into 152 6 times with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 256.0
Subtract 150 from 152 to get 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 25

On to step 5:
The number 25 fits into 22 0 times, leaving a remainder of 22.
Put 0 as the next digit of the answer. 
Result so far: 2560.0
The remainder is 22 after subtracting 0 from 22.
Include the next digit (3) from the dividend after 22, then repeat: 223 / 25

Let's proceed to step 6:
25 goes into 223 8 times with a remainder of 23.
The number 8 becomes the next digit in our result. 
Result so far: 25608.0
If we take 200 away from 223, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 7:
25 goes into 230 9 times with a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 25608.9
Deduct 225 from 230 and we're left 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.

Advancing to step 8:
25 can be fit into 50 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 25608.92
Subtracting 50 from 50 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:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 25608.92
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.

Step 10:
When dividing 0 by 25, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 25608.92
Deduct 0 from 0 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.

After the division, we end up with 25608.92 and a remainder of 0.0.