64121530 ÷ 86 
The aim is to understand the frequency of 86 in 64121530.

On to step 1:
86 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 86

Advancing to step 2:
64 divided by 86 is 0 with a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Append the next digit (1) from the dividend to 64 and continue with: 641 / 86

Let's proceed to step 3:
If we divide 641 by 86, we get 7 and a remainder of 39.
Write down 7 as next digit of the result. 
Result so far: 7.0
The remainder is 39 after subtracting 602 from 641.
Bring next digit (2) of the dividend behind the 39 and repeat the process: 392 / 86

Going ahead to step 4:
86 can be fit into 392 4 times, resulting in a remainder of 48.
Write down 4 as next digit of the result. 
Result so far: 74.0
Deduct 344 from 392 and we're left with 48.
Bring next digit (1) of the dividend behind the 48 and repeat the process: 481 / 86

Step 5:
The number 86 fits into 481 5 times, leaving a remainder of 51.
Use 5 as the next digit of our solution. 
Result so far: 745.0
Deduct 430 from 481 and we're left with 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 86

Let's proceed to step 6:
515 divided by 86 is 5 with a remainder of 85.
Put 5 as the next digit of the answer. 
Result so far: 7455.0
Deduct 430 from 515 and we're left with 85.
Take the next digit (3) from the dividend and append it to 85, then repeat: 853 / 86

Step 7:
If we divide 853 by 86, we get 9 and a remainder of 79.
The next digit of our result is 9. 
Result so far: 74559.0
The remainder is 79 after subtracting 774 from 853.
Append the next digit (0) from the dividend to 79 and continue with: 790 / 86

Step 8:
86 goes into 790 9 times with a remainder of 16.
The number 9 becomes the next digit in our result. 
Result so far: 745599.0
The remainder is 16 after subtracting 774 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
86 goes into 160 1 times with a remainder of 74.
Put 1 as the next digit of the answer. 
Result so far: 745599.1
Deduct 86 from 160 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 10:
86 goes into 740 8 times with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 745599.18
Subtract 688 from 740 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 11:
When dividing 520 by 86, we get 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 745599.186
Subtracting 516 from 520 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.

Let's proceed to step 12:
86 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 745599.186
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 13:
86 can be fit into 400 4 times, resulting in a remainder of 56.
The next digit of our result is 4. 
Result so far: 745599.18604
Deduct 344 from 400 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 14:
86 goes into 560 6 times with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 745599.186046
Deduct 516 from 560 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 15:
If we divide 440 by 86, we get 5 and a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 745599.1860465
Deduct 430 from 440 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 16:
86 can be fit into 100 1 times, resulting in a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 745599.18604651
Subtracting 86 from 100 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

After the division, we end up with 745599.18604651 and a remainder of 1.4e-08.