We're dividing 25120908 by 811 
We want to divide 25120908 by 811.

Let's proceed to step 1:
The number 811 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 811

Going ahead to step 2:
25 divided by 811 is 0 with a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Fetch the next digit (1) from the dividend, attach it to 25 and continue: 251 / 811

On to step 3:
811 goes into 251 0 times with a remainder of 251.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 251 and we're left with 251.
Include the next digit (2) from the dividend after 251, then repeat: 2512 / 811

On to step 4:
2512 divided by 811 is 3 with a remainder of 79.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 2433 from 2512, we get 79.
Bring next digit (0) of the dividend behind the 79 and repeat the process: 790 / 811

Let's proceed to step 5:
The number 811 fits into 790 0 times, leaving a remainder of 790.
The next digit of our result is 0. 
Result so far: 30.0
Subtracting 0 from 790 leaves us with 790.
Bring next digit (9) of the dividend behind the 790 and repeat the process: 7909 / 811

Moving on to step 6:
When dividing 7909 by 811, we get 9 with a remainder of 610.
The number 9 becomes the next digit in our result. 
Result so far: 309.0
If we take 7299 away from 7909, we end up with 610.
Append the next digit (0) from the dividend to 610 and continue with: 6100 / 811

Moving on to step 7:
811 can be fit into 6100 7 times, resulting in a remainder of 423.
Put 7 as the next digit of the answer. 
Result so far: 3097.0
Deduct 5677 from 6100 and we're left with 423.
Append the next digit (8) from the dividend to 423 and continue with: 4238 / 811

Let's proceed to step 8:
The number 811 fits into 4238 5 times, leaving a remainder of 183.
Put 5 as the next digit of the answer. 
Result so far: 30975.0
Subtracting 4055 from 4238 leaves us with 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Let's proceed to step 9:
If we divide 1830 by 811, we get 2 and a remainder of 208.
Record the quotient 2 as the next digit in the result. 
Result so far: 30975.2
Deduct 1622 from 1830 and we're left with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Advancing to step 10:
811 goes into 2080 2 times with a remainder of 458.
The number 2 becomes the next digit in our result. 
Result so far: 30975.22
If we subtract 1622 from 2080, we get 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

The quotient of the division is 30975.22, and the remainder is 0.458.