675998 divided by 81 
The aim is to understand the frequency of 81 in 675998.

Advancing to step 1:
6 divided by 81 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 81

Step 2:
81 goes into 67 0 times with a remainder of 67.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 67 to get 67.
Fetch the next digit (5) from the dividend, attach it to 67 and continue: 675 / 81

Let's proceed to step 3:
When dividing 675 by 81, we get 8 with a remainder of 27.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 648 from 675 leaves us with 27.
Take the next digit (9) from the dividend and append it to 27, then repeat: 279 / 81

Advancing to step 4:
81 can be fit into 279 3 times, resulting in a remainder of 36.
Put 3 as the next digit of the answer. 
Result so far: 83.0
Subtracting 243 from 279 leaves us with 36.
Bring next digit (9) of the dividend behind the 36 and repeat the process: 369 / 81

Let's proceed to step 5:
The number 81 fits into 369 4 times, leaving a remainder of 45.
Use 4 as the next digit of our solution. 
Result so far: 834.0
Subtract 324 from 369 to get 45.
Bring next digit (8) of the dividend behind the 45 and repeat the process: 458 / 81

Step 6:
The number 81 fits into 458 5 times, leaving a remainder of 53.
Use 5 as the next digit of our solution. 
Result so far: 8345.0
If we take 405 away from 458, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Let's proceed to step 7:
If we divide 530 by 81, we get 6 and a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 8345.6
Subtracting 486 from 530 leaves us 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.

Step 8:
440 divided by 81 is 5 with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 8345.65
Deduct 405 from 440 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 9:
When dividing 350 by 81, we get 4 with a remainder of 26.
The next digit of our result is 4. 
Result so far: 8345.654
If we subtract 324 from 350, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 10:
260 divided by 81 is 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 8345.6543
Subtract 243 from 260 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 11:
If we divide 170 by 81, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 8345.65432
Subtract 162 from 170 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
80 divided by 81 is 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 8345.65432
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 13:
If we divide 800 by 81, we get 9 and a remainder of 71.
The number 9 becomes the next digit in our result. 
Result so far: 8345.6543209
Subtract 729 from 800 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 14:
When dividing 710 by 81, we get 8 with a remainder of 62.
Record the quotient 8 as the next digit in the result. 
Result so far: 8345.65432098
Deduct 648 from 710 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

In conclusion, the division gives 8345.65432098 with a balance of 6.2e-08.