We divide 306979 by 81
The aim is to understand the frequency of 81 in 306979.

Step 1:
When dividing 3 by 81, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 81

Step 2:
30 divided by 81 is 0 with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Grab the next digit (6) from the dividend, add it to 30, then carry on: 306 / 81

Going ahead to step 3:
81 can be fit into 306 3 times, resulting in a remainder of 63.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 63 after subtracting 243 from 306.
Fetch the next digit (9) from the dividend, attach it to 63 and continue: 639 / 81

Let's proceed to step 4:
When dividing 639 by 81, we get 7 with a remainder of 72.
Use 7 as the next digit of our solution. 
Result so far: 37.0
Subtracting 567 from 639 leaves us with 72.
Take the next digit (7) from the dividend and append it to 72, then repeat: 727 / 81

Going ahead to step 5:
If we divide 727 by 81, we get 8 and a remainder of 79.
Use 8 as the next digit of our solution. 
Result so far: 378.0
If we take 648 away from 727, we end up with 79.
Include the next digit (9) from the dividend after 79, then repeat: 799 / 81

Moving on to step 6:
If we divide 799 by 81, we get 9 and a remainder of 70.
Write down 9 as next digit of the result. 
Result so far: 3789.0
Subtracting 729 from 799 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.

Moving on to step 7:
81 goes into 700 8 times with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 3789.8
If we subtract 648 from 700, we 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.

Let's proceed to step 8:
81 goes into 520 6 times with a remainder of 34.
The next digit of our result is 6. 
Result so far: 3789.86
Deduct 486 from 520 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 9:
340 divided by 81 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 3789.864
Subtracting 324 from 340 leaves us with 16.
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 10:
When dividing 160 by 81, we get 1 with a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 3789.8641
If we subtract 81 from 160, we 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.

Going ahead to step 11:
81 can be fit into 790 9 times, resulting in a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 3789.86419
Deduct 729 from 790 and we're left 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.

Moving on to step 12:
81 can be fit into 610 7 times, resulting in a remainder of 43.
The next digit of our result is 7. 
Result so far: 3789.864197
The remainder is 43 after subtracting 567 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 13:
430 divided by 81 is 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 3789.8641975
Deduct 405 from 430 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.

Moving on to step 14:
81 can be fit into 250 3 times, resulting in a remainder of 7.
The next digit of our result is 3. 
Result so far: 3789.86419753
If we subtract 243 from 250, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The quotient of the division is 3789.86419753, and the remainder is 7e-09.