We look at the division of 12872521 by 886 
We want to figure out the number of times 12872521 can be divided by 886.

Step 1:
When dividing 1 by 886, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 886

Going ahead to step 2:
886 can be fit into 12 0 times, resulting in a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 886

Going ahead to step 3:
When dividing 128 by 886, we get 0 with a remainder of 128.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 128 after subtracting 0 from 128.
Bring next digit (7) of the dividend behind the 128 and repeat the process: 1287 / 886

Advancing to step 4:
When dividing 1287 by 886, we get 1 with a remainder of 401.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 886 away from 1287, we end up with 401.
Grab the next digit (2) from the dividend, add it to 401, then carry on: 4012 / 886

On to step 5:
4012 divided by 886 is 4 with a remainder of 468.
Put 4 as the next digit of the answer. 
Result so far: 14.0
If we subtract 3544 from 4012, we get 468.
Append the next digit (5) from the dividend to 468 and continue with: 4685 / 886

On to step 6:
If we divide 4685 by 886, we get 5 and a remainder of 255.
Use 5 as the next digit of our solution. 
Result so far: 145.0
Subtract 4430 from 4685 to get 255.
Fetch the next digit (2) from the dividend, attach it to 255 and continue: 2552 / 886

Moving on to step 7:
886 goes into 2552 2 times with a remainder of 780.
The number 2 becomes the next digit in our result. 
Result so far: 1452.0
Subtract 1772 from 2552 to get 780.
Bring next digit (1) of the dividend behind the 780 and repeat the process: 7801 / 886

Moving on to step 8:
7801 divided by 886 is 8 with a remainder of 713.
Record the quotient 8 as the next digit in the result. 
Result so far: 14528.0
If we take 7088 away from 7801, we end up with 713.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7130, and continue the process.

Let's proceed to step 9:
If we divide 7130 by 886, we get 8 and a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 14528.8
If we take 7088 away from 7130, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 10:
886 goes into 420 0 times with a remainder of 420.
The number 0 becomes the next digit in our result. 
Result so far: 14528.8
Subtract 0 from 420 to get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Moving on to step 11:
When dividing 4200 by 886, we get 4 with a remainder of 656.
Put 4 as the next digit of the answer. 
Result so far: 14528.804
The remainder is 656 after subtracting 3544 from 4200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Let's proceed to step 12:
When dividing 6560 by 886, we get 7 with a remainder of 358.
The number 7 becomes the next digit in our result. 
Result so far: 14528.8047
Deduct 6202 from 6560 and we're left with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Step 13:
3580 divided by 886 is 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 14528.80474
If we take 3544 away from 3580, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 14:
If we divide 360 by 886, we get 0 and a remainder of 360.
The next digit of our result is 0. 
Result so far: 14528.80474
The remainder is 360 after subtracting 0 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Step 15:
886 can be fit into 3600 4 times, resulting in a remainder of 56.
Put 4 as the next digit of the answer. 
Result so far: 14528.8047404
Deduct 3544 from 3600 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 16:
886 goes into 560 0 times with a remainder of 560.
The number 0 becomes the next digit in our result. 
Result so far: 14528.8047404
Subtracting 0 from 560 leaves us with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

The final outcome is 14528.8047404, with a leftover of 5.6e-07.