12555474 ÷ 877 
We want to figure out the number of times 12555474 can be divided by 877.

Advancing to step 1:
When dividing 1 by 877, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 877

Step 2:
If we divide 12 by 877, we get 0 and a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 877

Going ahead to step 3:
The number 877 fits into 125 0 times, leaving a remainder of 125.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 125, we end up with 125.
Fetch the next digit (5) from the dividend, attach it to 125 and continue: 1255 / 877

Step 4:
877 can be fit into 1255 1 times, resulting in a remainder of 378.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 877 from 1255 and we're left with 378.
Fetch the next digit (5) from the dividend, attach it to 378 and continue: 3785 / 877

On to step 5:
877 goes into 3785 4 times with a remainder of 277.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
The remainder is 277 after subtracting 3508 from 3785.
Take the next digit (4) from the dividend and append it to 277, then repeat: 2774 / 877

Step 6:
When dividing 2774 by 877, we get 3 with a remainder of 143.
Put 3 as the next digit of the answer. 
Result so far: 143.0
The remainder is 143 after subtracting 2631 from 2774.
Include the next digit (7) from the dividend after 143, then repeat: 1437 / 877

Going ahead to step 7:
877 can be fit into 1437 1 times, resulting in a remainder of 560.
The number 1 becomes the next digit in our result. 
Result so far: 1431.0
If we take 877 away from 1437, we end up with 560.
Take the next digit (4) from the dividend and append it to 560, then repeat: 5604 / 877

Step 8:
877 can be fit into 5604 6 times, resulting in a remainder of 342.
Put 6 as the next digit of the answer. 
Result so far: 14316.0
Deduct 5262 from 5604 and we're left with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

On to step 9:
877 goes into 3420 3 times with a remainder of 789.
Put 3 as the next digit of the answer. 
Result so far: 14316.3
Subtract 2631 from 3420 to get 789.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7890, and continue the process.

Advancing to step 10:
7890 divided by 877 is 8 with a remainder of 874.
Write down 8 as next digit of the result. 
Result so far: 14316.38
If we subtract 7016 from 7890, we get 874.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8740, and continue the process.

Step 11:
8740 divided by 877 is 9 with a remainder of 847.
The next digit of our result is 9. 
Result so far: 14316.389
The remainder is 847 after subtracting 7893 from 8740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8470, and continue the process.

Moving on to step 12:
877 can be fit into 8470 9 times, resulting in a remainder of 577.
The number 9 becomes the next digit in our result. 
Result so far: 14316.3899
If we subtract 7893 from 8470, we get 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

After the division, we end up with 14316.3899 and a remainder of 0.00577.