Let's divide 25745214 by 866
We want to divide 25745214 by 866.

On to step 1:
The number 866 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 866

Going ahead to step 2:
866 goes into 25 0 times with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Take the next digit (7) from the dividend and append it to 25, then repeat: 257 / 866

Moving on to step 3:
The number 866 fits into 257 0 times, leaving a remainder of 257.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 257 and we're left with 257.
Bring next digit (4) of the dividend behind the 257 and repeat the process: 2574 / 866

On to step 4:
The number 866 fits into 2574 2 times, leaving a remainder of 842.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 1732 from 2574 leaves us with 842.
Include the next digit (5) from the dividend after 842, then repeat: 8425 / 866

Advancing to step 5:
8425 divided by 866 is 9 with a remainder of 631.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
The remainder is 631 after subtracting 7794 from 8425.
Grab the next digit (2) from the dividend, add it to 631, then carry on: 6312 / 866

Step 6:
The number 866 fits into 6312 7 times, leaving a remainder of 250.
The number 7 becomes the next digit in our result. 
Result so far: 297.0
Subtract 6062 from 6312 to get 250.
Fetch the next digit (1) from the dividend, attach it to 250 and continue: 2501 / 866

On to step 7:
866 can be fit into 2501 2 times, resulting in a remainder of 769.
Put 2 as the next digit of the answer. 
Result so far: 2972.0
If we subtract 1732 from 2501, we get 769.
Take the next digit (4) from the dividend and append it to 769, then repeat: 7694 / 866

On to step 8:
866 can be fit into 7694 8 times, resulting in a remainder of 766.
Record the quotient 8 as the next digit in the result. 
Result so far: 29728.0
The remainder is 766 after subtracting 6928 from 7694.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7660, and continue the process.

Going ahead to step 9:
866 can be fit into 7660 8 times, resulting in a remainder of 732.
Use 8 as the next digit of our solution. 
Result so far: 29728.8
Deduct 6928 from 7660 and we're left with 732.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7320, and continue the process.

Going ahead to step 10:
866 goes into 7320 8 times with a remainder of 392.
The number 8 becomes the next digit in our result. 
Result so far: 29728.88
If we subtract 6928 from 7320, we get 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

After the division, we end up with 29728.88 and a remainder of 0.392.