We're dividing 521259 by 25 
Let's see how many times 25 fits into 521259.

Moving on to step 1:
25 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 25

On to step 2:
25 can be fit into 52 2 times, resulting in a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 50 from 52, we get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 25

Let's proceed to step 3:
If we divide 21 by 25, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
The remainder is 21 after subtracting 0 from 21.
Grab the next digit (2) from the dividend, add it to 21, then carry on: 212 / 25

Let's proceed to step 4:
The number 25 fits into 212 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 208.0
Subtract 200 from 212 to get 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 25

Let's proceed to step 5:
When dividing 125 by 25, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 2085.0
If we subtract 125 from 125, we get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 25

Let's proceed to step 6:
The number 25 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 20850.0
Subtracting 0 from 9 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
90 divided by 25 is 3 with a remainder of 15.
The next digit of our result is 3. 
Result so far: 20850.3
Subtracting 75 from 90 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 8:
The number 25 fits into 150 6 times, leaving a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 20850.36
Subtract 150 from 150 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.

On to step 9:
25 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 20850.36
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 10:
25 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20850.36
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.

After the division, we end up with 20850.36 and a remainder of 0.0.