We divide 866109 by 13
The aim is to understand the frequency of 13 in 866109.

Moving on to step 1:
When dividing 8 by 13, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 13

Step 2:
If we divide 86 by 13, we get 6 and a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 8 after subtracting 78 from 86.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 13

Let's proceed to step 3:
13 goes into 86 6 times with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 66.0
Subtracting 78 from 86 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 13

Moving on to step 4:
When dividing 81 by 13, we get 6 with a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 666.0
The remainder is 3 after subtracting 78 from 81.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 13

Advancing to step 5:
When dividing 30 by 13, we get 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 6662.0
Subtracting 26 from 30 leaves us with 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 13

Step 6:
49 divided by 13 is 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 66623.0
If we subtract 39 from 49, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 7:
When dividing 100 by 13, we get 7 with a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 66623.7
The remainder is 9 after subtracting 91 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 8:
The number 13 fits into 90 6 times, leaving a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 66623.76
Subtract 78 from 90 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
120 divided by 13 is 9 with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 66623.769
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 10:
13 goes into 30 2 times with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 66623.7692
If we subtract 26 from 30, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 11:
13 can be fit into 40 3 times, resulting in a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 66623.76923
Deduct 39 from 40 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 12:
10 divided by 13 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 66623.76923
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 13:
13 goes into 100 7 times with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 66623.7692307
Subtracting 91 from 100 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 14:
When dividing 90 by 13, we get 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 66623.76923076
If we subtract 78 from 90, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

In conclusion, the division gives 66623.76923076 with a balance of 1.2e-08.