234641 divided by 81 
The aim is to understand the frequency of 81 in 234641.

Going ahead to step 1:
2 divided by 81 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 81

On to step 2:
If we divide 23 by 81, we get 0 and a remainder of 23.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 23, we end up with 23.
Fetch the next digit (4) from the dividend, attach it to 23 and continue: 234 / 81

On to step 3:
81 goes into 234 2 times with a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 162 from 234 to get 72.
Take the next digit (6) from the dividend and append it to 72, then repeat: 726 / 81

On to step 4:
The number 81 fits into 726 8 times, leaving a remainder of 78.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
Deduct 648 from 726 and we're left with 78.
Include the next digit (4) from the dividend after 78, then repeat: 784 / 81

On to step 5:
The number 81 fits into 784 9 times, leaving a remainder of 55.
Record the quotient 9 as the next digit in the result. 
Result so far: 289.0
If we take 729 away from 784, we end up with 55.
Grab the next digit (1) from the dividend, add it to 55, then carry on: 551 / 81

Moving on to step 6:
The number 81 fits into 551 6 times, leaving a remainder of 65.
The next digit of our result is 6. 
Result so far: 2896.0
If we subtract 486 from 551, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 7:
The number 81 fits into 650 8 times, leaving a remainder of 2.
The next digit of our result is 8. 
Result so far: 2896.8
The remainder is 2 after subtracting 648 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
If we divide 20 by 81, we get 0 and a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 2896.8
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
81 goes into 200 2 times with a remainder of 38.
Use 2 as the next digit of our solution. 
Result so far: 2896.802
Deduct 162 from 200 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 10:
81 can be fit into 380 4 times, resulting in a remainder of 56.
The next digit of our result is 4. 
Result so far: 2896.8024
Subtracting 324 from 380 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 11:
If we divide 560 by 81, we get 6 and a remainder of 74.
The next digit of our result is 6. 
Result so far: 2896.80246
Deduct 486 from 560 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 12:
When dividing 740 by 81, we get 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 2896.802469
Subtract 729 from 740 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 13:
If we divide 110 by 81, we get 1 and a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 2896.8024691
Subtracting 81 from 110 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 14:
81 can be fit into 290 3 times, resulting in a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 2896.80246913
Subtract 243 from 290 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Our division results in 2896.80246913 with a remaining 4.7e-08.