Let's divide 397824 by 81
The aim is to understand the frequency of 81 in 397824.

Step 1:
3 divided by 81 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 81

Let's proceed to step 2:
The number 81 fits into 39 0 times, leaving a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Append the next digit (7) from the dividend to 39 and continue with: 397 / 81

Step 3:
81 goes into 397 4 times with a remainder of 73.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 324 from 397, we get 73.
Grab the next digit (8) from the dividend, add it to 73, then carry on: 738 / 81

Moving on to step 4:
The number 81 fits into 738 9 times, leaving a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
If we subtract 729 from 738, we get 9.
Bring next digit (2) of the dividend behind the 9 and repeat the process: 92 / 81

Step 5:
The number 81 fits into 92 1 times, leaving a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 491.0
Deduct 81 from 92 and we're left with 11.
Include the next digit (4) from the dividend after 11, then repeat: 114 / 81

Let's proceed to step 6:
81 goes into 114 1 times with a remainder of 33.
Put 1 as the next digit of the answer. 
Result so far: 4911.0
The remainder is 33 after subtracting 81 from 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 7:
If we divide 330 by 81, we get 4 and a remainder of 6.
The next digit of our result is 4. 
Result so far: 4911.4
Subtract 324 from 330 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
If we divide 60 by 81, we get 0 and a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 4911.4
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
81 can be fit into 600 7 times, resulting in a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 4911.407
If we take 567 away from 600, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 10:
81 goes into 330 4 times with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 4911.4074
If we subtract 324 from 330, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 11:
When dividing 60 by 81, we get 0 with a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 4911.4074
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 12:
81 goes into 600 7 times with a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 4911.407407
The remainder is 33 after subtracting 567 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 13:
81 goes into 330 4 times with a remainder of 6.
The next digit of our result is 4. 
Result so far: 4911.4074074
If we take 324 away from 330, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 14:
81 can be fit into 60 0 times, resulting in a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 4911.4074074
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final outcome is 4911.4074074, with a leftover of 6e-08.