We're dividing 30658406 by 81 
The aim is to understand the frequency of 81 in 30658406.

Step 1:
3 divided by 81 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 81

Going ahead to step 2:
The number 81 fits into 30 0 times, leaving a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Fetch the next digit (6) from the dividend, attach it to 30 and continue: 306 / 81

Advancing to step 3:
306 divided by 81 is 3 with a remainder of 63.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 243 from 306, we get 63.
Bring next digit (5) of the dividend behind the 63 and repeat the process: 635 / 81

Let's proceed to step 4:
81 can be fit into 635 7 times, resulting in a remainder of 68.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
Deduct 567 from 635 and we're left with 68.
Bring next digit (8) of the dividend behind the 68 and repeat the process: 688 / 81

Going ahead to step 5:
If we divide 688 by 81, we get 8 and a remainder of 40.
Use 8 as the next digit of our solution. 
Result so far: 378.0
Subtract 648 from 688 to get 40.
Bring next digit (4) of the dividend behind the 40 and repeat the process: 404 / 81

Let's proceed to step 6:
When dividing 404 by 81, we get 4 with a remainder of 80.
The number 4 becomes the next digit in our result. 
Result so far: 3784.0
If we take 324 away from 404, we end up with 80.
Take the next digit (0) from the dividend and append it to 80, then repeat: 800 / 81

Advancing to step 7:
81 goes into 800 9 times with a remainder of 71.
The next digit of our result is 9. 
Result so far: 37849.0
The remainder is 71 after subtracting 729 from 800.
Fetch the next digit (6) from the dividend, attach it to 71 and continue: 716 / 81

Step 8:
When dividing 716 by 81, we get 8 with a remainder of 68.
Write down 8 as next digit of the result. 
Result so far: 378498.0
Subtracting 648 from 716 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 9:
680 divided by 81 is 8 with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 378498.8
Subtracting 648 from 680 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 10:
81 can be fit into 320 3 times, resulting in a remainder of 77.
Record the quotient 3 as the next digit in the result. 
Result so far: 378498.83
If we subtract 243 from 320, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 11:
When dividing 770 by 81, we get 9 with a remainder of 41.
The number 9 becomes the next digit in our result. 
Result so far: 378498.839
Subtracting 729 from 770 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 12:
When dividing 410 by 81, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 378498.8395
If we subtract 405 from 410, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 13:
50 divided by 81 is 0 with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 378498.8395
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 14:
If we divide 500 by 81, we get 6 and a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 378498.839506
If we take 486 away from 500, we end up 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.

Advancing to step 15:
81 goes into 140 1 times with a remainder of 59.
Put 1 as the next digit of the answer. 
Result so far: 378498.8395061
If we take 81 away from 140, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 16:
When dividing 590 by 81, we get 7 with a remainder of 23.
The next digit of our result is 7. 
Result so far: 378498.83950617
If we take 567 away from 590, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

The final outcome is 378498.83950617, with a leftover of 2.3e-08.