311224 divided by 81 
The aim is to understand the frequency of 81 in 311224.

Going ahead to step 1:
3 divided by 81 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 81

Let's proceed to step 2:
31 divided by 81 is 0 with a remainder of 31.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Fetch the next digit (1) from the dividend, attach it to 31 and continue: 311 / 81

Moving on to step 3:
If we divide 311 by 81, we get 3 and a remainder of 68.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 243 from 311 and we're left with 68.
Append the next digit (2) from the dividend to 68 and continue with: 682 / 81

Step 4:
When dividing 682 by 81, we get 8 with a remainder of 34.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
Deduct 648 from 682 and we're left with 34.
Include the next digit (2) from the dividend after 34, then repeat: 342 / 81

Step 5:
If we divide 342 by 81, we get 4 and a remainder of 18.
Put 4 as the next digit of the answer. 
Result so far: 384.0
If we take 324 away from 342, we end up with 18.
Grab the next digit (4) from the dividend, add it to 18, then carry on: 184 / 81

Let's proceed to step 6:
184 divided by 81 is 2 with a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 3842.0
Subtract 162 from 184 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
The number 81 fits into 220 2 times, leaving a remainder of 58.
The next digit of our result is 2. 
Result so far: 3842.2
If we take 162 away from 220, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 8:
The number 81 fits into 580 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 3842.27
The remainder is 13 after subtracting 567 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 9:
81 goes into 130 1 times with a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 3842.271
Subtracting 81 from 130 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 10:
81 can be fit into 490 6 times, resulting in a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 3842.2716
Deduct 486 from 490 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 11:
When dividing 40 by 81, we get 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 3842.2716
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 12:
The number 81 fits into 400 4 times, leaving a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 3842.271604
Subtract 324 from 400 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 13:
If we divide 760 by 81, we get 9 and a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 3842.2716049
Deduct 729 from 760 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Let's proceed to step 14:
81 can be fit into 310 3 times, resulting in a remainder of 67.
The number 3 becomes the next digit in our result. 
Result so far: 3842.27160493
Deduct 243 from 310 and we're left with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

The quotient of the division is 3842.27160493, and the remainder is 6.7e-08.