Let's divide 379240 by 81
The aim is to understand the frequency of 81 in 379240.

On to step 1:
81 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 81

Moving on to step 2:
The number 81 fits into 37 0 times, leaving a remainder of 37.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 37, we end up with 37.
Append the next digit (9) from the dividend to 37 and continue with: 379 / 81

Let's proceed to step 3:
81 can be fit into 379 4 times, resulting in a remainder of 55.
Write down 4 as next digit of the result. 
Result so far: 4.0
The remainder is 55 after subtracting 324 from 379.
Include the next digit (2) from the dividend after 55, then repeat: 552 / 81

Advancing to step 4:
81 can be fit into 552 6 times, resulting in a remainder of 66.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
Deduct 486 from 552 and we're left with 66.
Fetch the next digit (4) from the dividend, attach it to 66 and continue: 664 / 81

Moving on to step 5:
When dividing 664 by 81, we get 8 with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 468.0
Deduct 648 from 664 and we're left with 16.
Grab the next digit (0) from the dividend, add it to 16, then carry on: 160 / 81

Going ahead to step 6:
160 divided by 81 is 1 with a remainder of 79.
Put 1 as the next digit of the answer. 
Result so far: 4681.0
Deduct 81 from 160 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 7:
81 can be fit into 790 9 times, resulting in a remainder of 61.
Write down 9 as next digit of the result. 
Result so far: 4681.9
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 8:
When dividing 610 by 81, we get 7 with a remainder of 43.
Record the quotient 7 as the next digit in the result. 
Result so far: 4681.97
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.

Advancing to step 9:
If we divide 430 by 81, we get 5 and a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 4681.975
Subtract 405 from 430 to get 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 10:
250 divided by 81 is 3 with a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 4681.9753
The remainder is 7 after subtracting 243 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 11:
If we divide 70 by 81, we get 0 and a remainder of 70.
The next digit of our result is 0. 
Result so far: 4681.9753
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.

Step 12:
700 divided by 81 is 8 with a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 4681.975308
Deduct 648 from 700 and we're left 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.

Step 13:
520 divided by 81 is 6 with a remainder of 34.
The next digit of our result is 6. 
Result so far: 4681.9753086
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.

Let's proceed to step 14:
340 divided by 81 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 4681.97530864
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.

The final result is 4681.97530864 with a remainder of 1.6e-08.