381247 divided by 81 
The aim is to understand the frequency of 81 in 381247.

Going ahead to step 1:
If we divide 3 by 81, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 81

Moving on to step 2:
81 can be fit into 38 0 times, resulting in a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 38, we end up with 38.
Take the next digit (1) from the dividend and append it to 38, then repeat: 381 / 81

Going ahead to step 3:
The number 81 fits into 381 4 times, leaving a remainder of 57.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 324 away from 381, we end up with 57.
Take the next digit (2) from the dividend and append it to 57, then repeat: 572 / 81

Advancing to step 4:
The number 81 fits into 572 7 times, leaving a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 47.0
If we subtract 567 from 572, we get 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 81

Advancing to step 5:
81 goes into 54 0 times with a remainder of 54.
The number 0 becomes the next digit in our result. 
Result so far: 470.0
The remainder is 54 after subtracting 0 from 54.
Include the next digit (7) from the dividend after 54, then repeat: 547 / 81

Moving on to step 6:
81 can be fit into 547 6 times, resulting in a remainder of 61.
Write down 6 as next digit of the result. 
Result so far: 4706.0
Subtract 486 from 547 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 7:
When dividing 610 by 81, we get 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 4706.7
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 8:
81 goes into 430 5 times with a remainder of 25.
The next digit of our result is 5. 
Result so far: 4706.75
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.

Let's proceed to step 9:
81 goes into 250 3 times with a remainder of 7.
Use 3 as the next digit of our solution. 
Result so far: 4706.753
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.

Step 10:
81 can be fit into 70 0 times, resulting in a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 4706.753
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.

On to step 11:
81 can be fit into 700 8 times, resulting in a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 4706.75308
Subtract 648 from 700 to 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.

Moving on to step 12:
The number 81 fits into 520 6 times, leaving a remainder of 34.
The next digit of our result is 6. 
Result so far: 4706.753086
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 13:
340 divided by 81 is 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 4706.7530864
If we take 324 away from 340, we end up 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.

Let's proceed to step 14:
If we divide 160 by 81, we get 1 and a remainder of 79.
The next digit of our result is 1. 
Result so far: 4706.75308641
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.

Our division results in 4706.75308641 with a remaining 7.9e-08.