We divide 391363 by 81
The aim is to understand the frequency of 81 in 391363.

Let's proceed to step 1:
81 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 81

Let's proceed to step 2:
When dividing 39 by 81, we get 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Take the next digit (1) from the dividend and append it to 39, then repeat: 391 / 81

Advancing to step 3:
When dividing 391 by 81, we get 4 with a remainder of 67.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 324 from 391, we get 67.
Include the next digit (3) from the dividend after 67, then repeat: 673 / 81

Let's proceed to step 4:
81 can be fit into 673 8 times, resulting in a remainder of 25.
The next digit of our result is 8. 
Result so far: 48.0
If we subtract 648 from 673, we get 25.
Append the next digit (6) from the dividend to 25 and continue with: 256 / 81

Advancing to step 5:
256 divided by 81 is 3 with a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 483.0
Subtract 243 from 256 to get 13.
Grab the next digit (3) from the dividend, add it to 13, then carry on: 133 / 81

Let's proceed to step 6:
81 goes into 133 1 times with a remainder of 52.
Write down 1 as next digit of the result. 
Result so far: 4831.0
Subtracting 81 from 133 leaves us 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.

Moving on to step 7:
The number 81 fits into 520 6 times, leaving a remainder of 34.
Use 6 as the next digit of our solution. 
Result so far: 4831.6
Subtract 486 from 520 to 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.

Let's proceed to step 8:
340 divided by 81 is 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 4831.64
Deduct 324 from 340 and we're left 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.

Advancing to step 9:
81 goes into 160 1 times with a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 4831.641
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.

Let's proceed to step 10:
If we divide 790 by 81, we get 9 and a remainder of 61.
The next digit of our result is 9. 
Result so far: 4831.6419
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.

Going ahead to step 11:
The number 81 fits into 610 7 times, leaving a remainder of 43.
Record the quotient 7 as the next digit in the result. 
Result so far: 4831.64197
Subtracting 567 from 610 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 12:
430 divided by 81 is 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 4831.641975
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.

On to step 13:
250 divided by 81 is 3 with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 4831.6419753
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.

On to step 14:
When dividing 70 by 81, we get 0 with a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 4831.6419753
Deduct 0 from 70 and we're left 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.

The final result is 4831.6419753 with a remainder of 7e-08.