Let's divide 25495816 by 851
We want to divide 25495816 by 851.

Going ahead to step 1:
851 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 851

Advancing to step 2:
851 goes into 25 0 times with a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Bring next digit (4) of the dividend behind the 25 and repeat the process: 254 / 851

Moving on to step 3:
254 divided by 851 is 0 with a remainder of 254.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 254 and we're left with 254.
Take the next digit (9) from the dividend and append it to 254, then repeat: 2549 / 851

On to step 4:
The number 851 fits into 2549 2 times, leaving a remainder of 847.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 1702 from 2549 to get 847.
Include the next digit (5) from the dividend after 847, then repeat: 8475 / 851

Advancing to step 5:
The number 851 fits into 8475 9 times, leaving a remainder of 816.
Put 9 as the next digit of the answer. 
Result so far: 29.0
Subtracting 7659 from 8475 leaves us with 816.
Grab the next digit (8) from the dividend, add it to 816, then carry on: 8168 / 851

Let's proceed to step 6:
The number 851 fits into 8168 9 times, leaving a remainder of 509.
The number 9 becomes the next digit in our result. 
Result so far: 299.0
Subtract 7659 from 8168 to get 509.
Grab the next digit (1) from the dividend, add it to 509, then carry on: 5091 / 851

Going ahead to step 7:
851 can be fit into 5091 5 times, resulting in a remainder of 836.
The next digit of our result is 5. 
Result so far: 2995.0
The remainder is 836 after subtracting 4255 from 5091.
Grab the next digit (6) from the dividend, add it to 836, then carry on: 8366 / 851

On to step 8:
851 can be fit into 8366 9 times, resulting in a remainder of 707.
Use 9 as the next digit of our solution. 
Result so far: 29959.0
Subtract 7659 from 8366 to get 707.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7070, and continue the process.

Moving on to step 9:
851 can be fit into 7070 8 times, resulting in a remainder of 262.
Put 8 as the next digit of the answer. 
Result so far: 29959.8
If we take 6808 away from 7070, we end up with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

On to step 10:
When dividing 2620 by 851, we get 3 with a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 29959.83
Subtract 2553 from 2620 to get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Moving on to step 11:
The number 851 fits into 670 0 times, leaving a remainder of 670.
Put 0 as the next digit of the answer. 
Result so far: 29959.83
The remainder is 670 after subtracting 0 from 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

On to step 12:
When dividing 6700 by 851, we get 7 with a remainder of 743.
Record the quotient 7 as the next digit in the result. 
Result so far: 29959.8307
Deduct 5957 from 6700 and we're left with 743.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7430, and continue the process.

Step 13:
851 can be fit into 7430 8 times, resulting in a remainder of 622.
The next digit of our result is 8. 
Result so far: 29959.83078
If we take 6808 away from 7430, we end up with 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

On to step 14:
851 goes into 6220 7 times with a remainder of 263.
The number 7 becomes the next digit in our result. 
Result so far: 29959.830787
Deduct 5957 from 6220 and we're left with 263.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2630, and continue the process.

On to step 15:
The number 851 fits into 2630 3 times, leaving a remainder of 77.
Put 3 as the next digit of the answer. 
Result so far: 29959.8307873
If we subtract 2553 from 2630, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

On to step 16:
The number 851 fits into 770 0 times, leaving a remainder of 770.
The next digit of our result is 0. 
Result so far: 29959.8307873
If we take 0 away from 770, we end up with 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

After the division, we end up with 29959.8307873 and a remainder of 7.7e-07.