We're dividing 102402 by 25 
We want to divide 102402 by 25.

Moving on to step 1:
The number 25 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 25

On to step 2:
10 divided by 25 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 10 and we're left with 10.
Take the next digit (2) from the dividend and append it to 10, then repeat: 102 / 25

Step 3:
25 can be fit into 102 4 times, resulting in a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 100 away from 102, we end up with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 25

On to step 4:
25 can be fit into 24 0 times, resulting in a remainder of 24.
Put 0 as the next digit of the answer. 
Result so far: 40.0
Subtract 0 from 24 to get 24.
Grab the next digit (0) from the dividend, add it to 24, then carry on: 240 / 25

Going ahead to step 5:
If we divide 240 by 25, we get 9 and a remainder of 15.
Write down 9 as next digit of the result. 
Result so far: 409.0
If we take 225 away from 240, we end up with 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 25

On to step 6:
152 divided by 25 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 4096.0
If we subtract 150 from 152, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 7:
When dividing 20 by 25, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 4096.0
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
200 divided by 25 is 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 4096.08
If we subtract 200 from 200, 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.

Moving on to step 9:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4096.08
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.

On to 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: 4096.08
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.

The final result is 4096.08 with a remainder of 0.0.