We're dividing 12840807 by 512 
We want to divide 12840807 by 512.

Let's proceed to step 1:
512 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 512

Moving on to step 2:
When dividing 12 by 512, we get 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 512

Going ahead to step 3:
If we divide 128 by 512, we get 0 and a remainder of 128.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 128, we end up with 128.
Take the next digit (4) from the dividend and append it to 128, then repeat: 1284 / 512

Advancing to step 4:
512 goes into 1284 2 times with a remainder of 260.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 1024 from 1284, we get 260.
Grab the next digit (0) from the dividend, add it to 260, then carry on: 2600 / 512

On to step 5:
If we divide 2600 by 512, we get 5 and a remainder of 40.
Put 5 as the next digit of the answer. 
Result so far: 25.0
If we subtract 2560 from 2600, we get 40.
Fetch the next digit (8) from the dividend, attach it to 40 and continue: 408 / 512

Step 6:
408 divided by 512 is 0 with a remainder of 408.
The number 0 becomes the next digit in our result. 
Result so far: 250.0
Subtracting 0 from 408 leaves us with 408.
Fetch the next digit (0) from the dividend, attach it to 408 and continue: 4080 / 512

Step 7:
512 can be fit into 4080 7 times, resulting in a remainder of 496.
Put 7 as the next digit of the answer. 
Result so far: 2507.0
Deduct 3584 from 4080 and we're left with 496.
Take the next digit (7) from the dividend and append it to 496, then repeat: 4967 / 512

Going ahead to step 8:
4967 divided by 512 is 9 with a remainder of 359.
Put 9 as the next digit of the answer. 
Result so far: 25079.0
Deduct 4608 from 4967 and we're left with 359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

Moving on to step 9:
3590 divided by 512 is 7 with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 25079.7
If we subtract 3584 from 3590, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 10:
If we divide 60 by 512, we get 0 and a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 25079.7
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 11:
If we divide 600 by 512, we get 1 and a remainder of 88.
Write down 1 as next digit of the result. 
Result so far: 25079.701
Subtract 512 from 600 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Advancing to step 12:
If we divide 880 by 512, we get 1 and a remainder of 368.
Write down 1 as next digit of the result. 
Result so far: 25079.7011
If we subtract 512 from 880, we get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

In conclusion, the division gives 25079.7011 with a balance of 0.00368.