We're dividing 12497145 by 869 
Our goal is to divide 12497145 by 869.

Advancing to step 1:
869 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 869

Moving on to step 2:
If we divide 12 by 869, we get 0 and a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 869

Step 3:
If we divide 124 by 869, we get 0 and a remainder of 124.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 124, we get 124.
Include the next digit (9) from the dividend after 124, then repeat: 1249 / 869

Let's proceed to step 4:
869 can be fit into 1249 1 times, resulting in a remainder of 380.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 869 away from 1249, we end up with 380.
Include the next digit (7) from the dividend after 380, then repeat: 3807 / 869

On to step 5:
If we divide 3807 by 869, we get 4 and a remainder of 331.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Deduct 3476 from 3807 and we're left with 331.
Append the next digit (1) from the dividend to 331 and continue with: 3311 / 869

Let's proceed to step 6:
The number 869 fits into 3311 3 times, leaving a remainder of 704.
The number 3 becomes the next digit in our result. 
Result so far: 143.0
The remainder is 704 after subtracting 2607 from 3311.
Grab the next digit (4) from the dividend, add it to 704, then carry on: 7044 / 869

Let's proceed to step 7:
When dividing 7044 by 869, we get 8 with a remainder of 92.
Put 8 as the next digit of the answer. 
Result so far: 1438.0
Subtracting 6952 from 7044 leaves us with 92.
Bring next digit (5) of the dividend behind the 92 and repeat the process: 925 / 869

Step 8:
925 divided by 869 is 1 with a remainder of 56.
Record the quotient 1 as the next digit in the result. 
Result so far: 14381.0
If we subtract 869 from 925, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 9:
560 divided by 869 is 0 with a remainder of 560.
The next digit of our result is 0. 
Result so far: 14381.0
If we take 0 away from 560, we end up 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.

Moving on to step 10:
When dividing 5600 by 869, we get 6 with a remainder of 386.
Record the quotient 6 as the next digit in the result. 
Result so far: 14381.06
If we take 5214 away from 5600, we end up with 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

On to step 11:
3860 divided by 869 is 4 with a remainder of 384.
Put 4 as the next digit of the answer. 
Result so far: 14381.064
Subtracting 3476 from 3860 leaves us with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Advancing to step 12:
If we divide 3840 by 869, we get 4 and a remainder of 364.
Record the quotient 4 as the next digit in the result. 
Result so far: 14381.0644
The remainder is 364 after subtracting 3476 from 3840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

The final outcome is 14381.0644, with a leftover of 0.00364.