We're dividing 12839043 by 879 
Let's see how many times 879 fits into 12839043.

Step 1:
The number 879 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 879

Advancing to step 2:
879 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
If we take 0 away from 12, we end up with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 879

On to step 3:
If we divide 128 by 879, we get 0 and a remainder of 128.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 128 to get 128.
Include the next digit (3) from the dividend after 128, then repeat: 1283 / 879

Advancing to step 4:
The number 879 fits into 1283 1 times, leaving a remainder of 404.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 879 from 1283, we get 404.
Take the next digit (9) from the dividend and append it to 404, then repeat: 4049 / 879

Moving on to step 5:
The number 879 fits into 4049 4 times, leaving a remainder of 533.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Deduct 3516 from 4049 and we're left with 533.
Fetch the next digit (0) from the dividend, attach it to 533 and continue: 5330 / 879

Step 6:
The number 879 fits into 5330 6 times, leaving a remainder of 56.
The number 6 becomes the next digit in our result. 
Result so far: 146.0
Deduct 5274 from 5330 and we're left with 56.
Include the next digit (4) from the dividend after 56, then repeat: 564 / 879

Advancing to step 7:
The number 879 fits into 564 0 times, leaving a remainder of 564.
Record the quotient 0 as the next digit in the result. 
Result so far: 1460.0
Subtracting 0 from 564 leaves us with 564.
Fetch the next digit (3) from the dividend, attach it to 564 and continue: 5643 / 879

Moving on to step 8:
879 can be fit into 5643 6 times, resulting in a remainder of 369.
Use 6 as the next digit of our solution. 
Result so far: 14606.0
If we subtract 5274 from 5643, we get 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Going ahead to step 9:
879 goes into 3690 4 times with a remainder of 174.
The next digit of our result is 4. 
Result so far: 14606.4
If we take 3516 away from 3690, we end up with 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Advancing to step 10:
If we divide 1740 by 879, we get 1 and a remainder of 861.
The number 1 becomes the next digit in our result. 
Result so far: 14606.41
The remainder is 861 after subtracting 879 from 1740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8610, and continue the process.

Going ahead to step 11:
879 can be fit into 8610 9 times, resulting in a remainder of 699.
The next digit of our result is 9. 
Result so far: 14606.419
Deduct 7911 from 8610 and we're left with 699.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6990, and continue the process.

Advancing to step 12:
6990 divided by 879 is 7 with a remainder of 837.
Use 7 as the next digit of our solution. 
Result so far: 14606.4197
Subtracting 6153 from 6990 leaves us with 837.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8370, and continue the process.

Going ahead to step 13:
8370 divided by 879 is 9 with a remainder of 459.
Use 9 as the next digit of our solution. 
Result so far: 14606.41979
Subtracting 7911 from 8370 leaves us with 459.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4590, and continue the process.

Going ahead to step 14:
4590 divided by 879 is 5 with a remainder of 195.
Use 5 as the next digit of our solution. 
Result so far: 14606.419795
If we subtract 4395 from 4590, we get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

On to step 15:
The number 879 fits into 1950 2 times, leaving a remainder of 192.
Put 2 as the next digit of the answer. 
Result so far: 14606.4197952
Subtract 1758 from 1950 to get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Moving on to step 16:
The number 879 fits into 1920 2 times, leaving a remainder of 162.
Record the quotient 2 as the next digit in the result. 
Result so far: 14606.41979522
Subtract 1758 from 1920 to get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

The final outcome is 14606.41979522, with a leftover of 1.62e-07.