676942 ÷ 81 
The aim is to understand the frequency of 81 in 676942.

Going ahead to step 1:
If we divide 6 by 81, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 81

Step 2:
When dividing 67 by 81, we get 0 with a remainder of 67.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 67 after subtracting 0 from 67.
Bring next digit (6) of the dividend behind the 67 and repeat the process: 676 / 81

On to step 3:
676 divided by 81 is 8 with a remainder of 28.
The next digit of our result is 8. 
Result so far: 8.0
If we take 648 away from 676, we end up with 28.
Bring next digit (9) of the dividend behind the 28 and repeat the process: 289 / 81

Step 4:
When dividing 289 by 81, we get 3 with a remainder of 46.
The number 3 becomes the next digit in our result. 
Result so far: 83.0
Subtracting 243 from 289 leaves us with 46.
Take the next digit (4) from the dividend and append it to 46, then repeat: 464 / 81

Advancing to step 5:
When dividing 464 by 81, we get 5 with a remainder of 59.
Put 5 as the next digit of the answer. 
Result so far: 835.0
Deduct 405 from 464 and we're left with 59.
Bring next digit (2) of the dividend behind the 59 and repeat the process: 592 / 81

Moving on to step 6:
81 goes into 592 7 times with a remainder of 25.
Put 7 as the next digit of the answer. 
Result so far: 8357.0
Deduct 567 from 592 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 7:
The number 81 fits into 250 3 times, leaving a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 8357.3
Subtracting 243 from 250 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
81 can be fit into 70 0 times, resulting in a remainder of 70.
The next digit of our result is 0. 
Result so far: 8357.3
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 9:
When dividing 700 by 81, we get 8 with a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 8357.308
If we take 648 away from 700, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 10:
81 goes into 520 6 times with a remainder of 34.
The next digit of our result is 6. 
Result so far: 8357.3086
If we subtract 486 from 520, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 11:
340 divided by 81 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 8357.30864
Subtract 324 from 340 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 12:
The number 81 fits into 160 1 times, leaving a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 8357.308641
Subtract 81 from 160 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Advancing to step 13:
If we divide 790 by 81, we get 9 and a remainder of 61.
Write down 9 as next digit of the result. 
Result so far: 8357.3086419
If we take 729 away from 790, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 14:
81 can be fit into 610 7 times, resulting in a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 8357.30864197
If we subtract 567 from 610, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

After the division, we end up with 8357.30864197 and a remainder of 4.3e-08.