We're dividing 223716 by 81 
The aim is to understand the frequency of 81 in 223716.

Advancing to step 1:
If we divide 2 by 81, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 81

Step 2:
22 divided by 81 is 0 with a remainder of 22.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 22, we end up with 22.
Append the next digit (3) from the dividend to 22 and continue with: 223 / 81

Step 3:
81 goes into 223 2 times with a remainder of 61.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 162 away from 223, we end up with 61.
Append the next digit (7) from the dividend to 61 and continue with: 617 / 81

Let's proceed to step 4:
617 divided by 81 is 7 with a remainder of 50.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Deduct 567 from 617 and we're left with 50.
Append the next digit (1) from the dividend to 50 and continue with: 501 / 81

Going ahead to step 5:
501 divided by 81 is 6 with a remainder of 15.
Put 6 as the next digit of the answer. 
Result so far: 276.0
Subtract 486 from 501 to get 15.
Grab the next digit (6) from the dividend, add it to 15, then carry on: 156 / 81

Going ahead to step 6:
81 goes into 156 1 times with a remainder of 75.
The next digit of our result is 1. 
Result so far: 2761.0
If we subtract 81 from 156, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 7:
750 divided by 81 is 9 with a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 2761.9
If we subtract 729 from 750, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 8:
The number 81 fits into 210 2 times, leaving a remainder of 48.
Put 2 as the next digit of the answer. 
Result so far: 2761.92
Subtracting 162 from 210 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 9:
81 goes into 480 5 times with a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 2761.925
Subtracting 405 from 480 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 10:
When dividing 750 by 81, we get 9 with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 2761.9259
The remainder is 21 after subtracting 729 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 11:
If we divide 210 by 81, we get 2 and a remainder of 48.
Write down 2 as next digit of the result. 
Result so far: 2761.92592
If we take 162 away from 210, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 12:
81 can be fit into 480 5 times, resulting in a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 2761.925925
Subtracting 405 from 480 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 13:
750 divided by 81 is 9 with a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 2761.9259259
Deduct 729 from 750 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 14:
210 divided by 81 is 2 with a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 2761.92592592
If we take 162 away from 210, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The quotient of the division is 2761.92592592, and the remainder is 4.8e-08.