12816579 divided by 671 
The aim is to understand the frequency of 671 in 12816579.

Let's proceed to step 1:
The number 671 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 671

Step 2:
If we divide 12 by 671, we get 0 and a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 671

Step 3:
671 goes into 128 0 times with a remainder of 128.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 128 after subtracting 0 from 128.
Bring next digit (1) of the dividend behind the 128 and repeat the process: 1281 / 671

Going ahead to step 4:
When dividing 1281 by 671, we get 1 with a remainder of 610.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 671 from 1281 to get 610.
Include the next digit (6) from the dividend after 610, then repeat: 6106 / 671

On to step 5:
When dividing 6106 by 671, we get 9 with a remainder of 67.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Subtracting 6039 from 6106 leaves us with 67.
Include the next digit (5) from the dividend after 67, then repeat: 675 / 671

On to step 6:
The number 671 fits into 675 1 times, leaving a remainder of 4.
The next digit of our result is 1. 
Result so far: 191.0
The remainder is 4 after subtracting 671 from 675.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 671

Step 7:
671 goes into 47 0 times with a remainder of 47.
Put 0 as the next digit of the answer. 
Result so far: 1910.0
If we subtract 0 from 47, we get 47.
Take the next digit (9) from the dividend and append it to 47, then repeat: 479 / 671

On to step 8:
671 can be fit into 479 0 times, resulting in a remainder of 479.
Put 0 as the next digit of the answer. 
Result so far: 19100.0
Subtract 0 from 479 to get 479.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Step 9:
When dividing 4790 by 671, we get 7 with a remainder of 93.
The number 7 becomes the next digit in our result. 
Result so far: 19100.7
Deduct 4697 from 4790 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Moving on to step 10:
930 divided by 671 is 1 with a remainder of 259.
The next digit of our result is 1. 
Result so far: 19100.71
If we take 671 away from 930, we end up with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Advancing to step 11:
671 can be fit into 2590 3 times, resulting in a remainder of 577.
The next digit of our result is 3. 
Result so far: 19100.713
Subtracting 2013 from 2590 leaves us with 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Going ahead to step 12:
671 can be fit into 5770 8 times, resulting in a remainder of 402.
Record the quotient 8 as the next digit in the result. 
Result so far: 19100.7138
The remainder is 402 after subtracting 5368 from 5770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

On to step 13:
If we divide 4020 by 671, we get 5 and a remainder of 665.
Use 5 as the next digit of our solution. 
Result so far: 19100.71385
Subtracting 3355 from 4020 leaves us with 665.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6650, and continue the process.

Moving on to step 14:
6650 divided by 671 is 9 with a remainder of 611.
The number 9 becomes the next digit in our result. 
Result so far: 19100.713859
If we take 6039 away from 6650, we end up with 611.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6110, and continue the process.

On to step 15:
The number 671 fits into 6110 9 times, leaving a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 19100.7138599
Subtracting 6039 from 6110 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

The final result is 19100.7138599 with a remainder of 7.1e-07.