We divide 638405 by 25
Our goal is to divide 638405 by 25.

Advancing to step 1:
When dividing 6 by 25, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 25

Going ahead to step 2:
If we divide 63 by 25, we get 2 and a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 50 from 63 and we're left with 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 25

Step 3:
25 goes into 138 5 times with a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Subtract 125 from 138 to get 13.
Fetch the next digit (4) from the dividend, attach it to 13 and continue: 134 / 25

Moving on to step 4:
25 can be fit into 134 5 times, resulting in a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 255.0
If we take 125 away from 134, we end up with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 25

Going ahead to step 5:
25 goes into 90 3 times with a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 2553.0
Deduct 75 from 90 and we're left with 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 25

Going ahead to step 6:
25 can be fit into 155 6 times, resulting in a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 25536.0
If we subtract 150 from 155, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
25 can be fit into 50 2 times, resulting in a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 25536.2
If we take 50 away from 50, 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.

Step 8:
If we divide 0 by 25, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 25536.2
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.

Advancing to step 9:
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: 25536.2
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.

After the division, we end up with 25536.2 and a remainder of 0.0.