64727425 divided by 13 
The aim is to understand the frequency of 13 in 64727425.

Advancing to step 1:
If we divide 6 by 13, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 13

Let's proceed to step 2:
13 goes into 64 4 times with a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 12 after subtracting 52 from 64.
Fetch the next digit (7) from the dividend, attach it to 12 and continue: 127 / 13

Step 3:
127 divided by 13 is 9 with a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 49.0
The remainder is 10 after subtracting 117 from 127.
Include the next digit (2) from the dividend after 10, then repeat: 102 / 13

Going ahead to step 4:
The number 13 fits into 102 7 times, leaving a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 497.0
Subtracting 91 from 102 leaves us with 11.
Grab the next digit (7) from the dividend, add it to 11, then carry on: 117 / 13

Let's proceed to step 5:
The number 13 fits into 117 9 times, leaving a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 4979.0
If we take 117 away from 117, we end up with 0.
Take the next digit (4) from the dividend and append it to 0, then repeat: 4 / 13

Step 6:
4 divided by 13 is 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 49790.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 13

Moving on to step 7:
13 goes into 42 3 times with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 497903.0
If we take 39 away from 42, we end up with 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 13

On to step 8:
When dividing 35 by 13, we get 2 with a remainder of 9.
Use 2 as the next digit of our solution. 
Result so far: 4979032.0
The remainder is 9 after subtracting 26 from 35.
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 9:
90 divided by 13 is 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 4979032.6
The remainder is 12 after subtracting 78 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 10:
When dividing 120 by 13, we get 9 with a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 4979032.69
If we take 117 away from 120, we end up 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.

Going ahead to step 11:
13 goes into 30 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 4979032.692
Subtracting 26 from 30 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 12:
When dividing 40 by 13, we get 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 4979032.6923
If we subtract 39 from 40, we get 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 13:
If we divide 10 by 13, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 4979032.6923
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.

Step 14:
When dividing 100 by 13, we get 7 with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 4979032.692307
Subtract 91 from 100 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 15:
13 goes into 90 6 times with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 4979032.6923076
Subtracting 78 from 90 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 16:
When dividing 120 by 13, we get 9 with a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 4979032.69230769
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.

The final result is 4979032.69230769 with a remainder of 3e-09.