We're dividing 25815391 by 115 
Let's see how many times 115 fits into 25815391.

Let's proceed to step 1:
If we divide 2 by 115, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 115

Moving on to step 2:
115 goes into 25 0 times with a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Append the next digit (8) from the dividend to 25 and continue with: 258 / 115

Going ahead to step 3:
When dividing 258 by 115, we get 2 with a remainder of 28.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 230 from 258 to get 28.
Take the next digit (1) from the dividend and append it to 28, then repeat: 281 / 115

Step 4:
The number 115 fits into 281 2 times, leaving a remainder of 51.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
If we take 230 away from 281, we end up with 51.
Grab the next digit (5) from the dividend, add it to 51, then carry on: 515 / 115

On to step 5:
115 can be fit into 515 4 times, resulting in a remainder of 55.
The number 4 becomes the next digit in our result. 
Result so far: 224.0
Deduct 460 from 515 and we're left with 55.
Take the next digit (3) from the dividend and append it to 55, then repeat: 553 / 115

Going ahead to step 6:
If we divide 553 by 115, we get 4 and a remainder of 93.
Record the quotient 4 as the next digit in the result. 
Result so far: 2244.0
Deduct 460 from 553 and we're left with 93.
Grab the next digit (9) from the dividend, add it to 93, then carry on: 939 / 115

Advancing to step 7:
The number 115 fits into 939 8 times, leaving a remainder of 19.
The next digit of our result is 8. 
Result so far: 22448.0
The remainder is 19 after subtracting 920 from 939.
Bring next digit (1) of the dividend behind the 19 and repeat the process: 191 / 115

Let's proceed to step 8:
If we divide 191 by 115, we get 1 and a remainder of 76.
Record the quotient 1 as the next digit in the result. 
Result so far: 224481.0
Subtract 115 from 191 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Going ahead to step 9:
If we divide 760 by 115, we get 6 and a remainder of 70.
Write down 6 as next digit of the result. 
Result so far: 224481.6
If we take 690 away from 760, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 10:
700 divided by 115 is 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 224481.66
Deduct 690 from 700 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 224481.66 with a remaining 0.01.