We look at the division of 12878345 by 725 
Let's see how many times 725 fits into 12878345.

On to step 1:
If we divide 1 by 725, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 725

Advancing to step 2:
When dividing 12 by 725, we get 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 725

Let's proceed to step 3:
128 divided by 725 is 0 with a remainder of 128.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 128 leaves us with 128.
Bring next digit (7) of the dividend behind the 128 and repeat the process: 1287 / 725

Advancing to step 4:
If we divide 1287 by 725, we get 1 and a remainder of 562.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 725 from 1287 to get 562.
Append the next digit (8) from the dividend to 562 and continue with: 5628 / 725

Advancing to step 5:
5628 divided by 725 is 7 with a remainder of 553.
The next digit of our result is 7. 
Result so far: 17.0
The remainder is 553 after subtracting 5075 from 5628.
Include the next digit (3) from the dividend after 553, then repeat: 5533 / 725

Going ahead to step 6:
The number 725 fits into 5533 7 times, leaving a remainder of 458.
Write down 7 as next digit of the result. 
Result so far: 177.0
Subtracting 5075 from 5533 leaves us with 458.
Grab the next digit (4) from the dividend, add it to 458, then carry on: 4584 / 725

Step 7:
The number 725 fits into 4584 6 times, leaving a remainder of 234.
Put 6 as the next digit of the answer. 
Result so far: 1776.0
Subtracting 4350 from 4584 leaves us with 234.
Fetch the next digit (5) from the dividend, attach it to 234 and continue: 2345 / 725

Let's proceed to step 8:
725 goes into 2345 3 times with a remainder of 170.
Put 3 as the next digit of the answer. 
Result so far: 17763.0
Subtract 2175 from 2345 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 9:
725 can be fit into 1700 2 times, resulting in a remainder of 250.
Write down 2 as next digit of the result. 
Result so far: 17763.2
Subtracting 1450 from 1700 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 10:
If we divide 2500 by 725, we get 3 and a remainder of 325.
The number 3 becomes the next digit in our result. 
Result so far: 17763.23
Deduct 2175 from 2500 and we're left with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

On to step 11:
The number 725 fits into 3250 4 times, leaving a remainder of 350.
Write down 4 as next digit of the result. 
Result so far: 17763.234
Subtracting 2900 from 3250 leaves us with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Let's proceed to step 12:
The number 725 fits into 3500 4 times, leaving a remainder of 600.
Put 4 as the next digit of the answer. 
Result so far: 17763.2344
If we take 2900 away from 3500, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Our division results in 17763.2344 with a remaining 0.006.