368884 ÷ 81 
The aim is to understand the frequency of 81 in 368884.

On to step 1:
The number 81 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 81

Moving on to step 2:
81 goes into 36 0 times with a remainder of 36.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 36, we get 36.
Bring next digit (8) of the dividend behind the 36 and repeat the process: 368 / 81

Moving on to step 3:
81 goes into 368 4 times with a remainder of 44.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 324 from 368 and we're left with 44.
Bring next digit (8) of the dividend behind the 44 and repeat the process: 448 / 81

Advancing to step 4:
If we divide 448 by 81, we get 5 and a remainder of 43.
Use 5 as the next digit of our solution. 
Result so far: 45.0
The remainder is 43 after subtracting 405 from 448.
Grab the next digit (8) from the dividend, add it to 43, then carry on: 438 / 81

Let's proceed to step 5:
438 divided by 81 is 5 with a remainder of 33.
Record the quotient 5 as the next digit in the result. 
Result so far: 455.0
Deduct 405 from 438 and we're left with 33.
Take the next digit (4) from the dividend and append it to 33, then repeat: 334 / 81

Advancing to step 6:
The number 81 fits into 334 4 times, leaving a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 4554.0
Deduct 324 from 334 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
81 can be fit into 100 1 times, resulting in a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 4554.1
Subtracting 81 from 100 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 8:
The number 81 fits into 190 2 times, leaving a remainder of 28.
The next digit of our result is 2. 
Result so far: 4554.12
If we subtract 162 from 190, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 9:
If we divide 280 by 81, we get 3 and a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 4554.123
If we subtract 243 from 280, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 10:
When dividing 370 by 81, we get 4 with a remainder of 46.
Record the quotient 4 as the next digit in the result. 
Result so far: 4554.1234
Subtract 324 from 370 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 11:
When dividing 460 by 81, we get 5 with a remainder of 55.
Use 5 as the next digit of our solution. 
Result so far: 4554.12345
Subtracting 405 from 460 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Moving on to step 12:
81 can be fit into 550 6 times, resulting in a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 4554.123456
If we subtract 486 from 550, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 13:
81 goes into 640 7 times with a remainder of 73.
Record the quotient 7 as the next digit in the result. 
Result so far: 4554.1234567
Subtract 567 from 640 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 14:
When dividing 730 by 81, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 4554.12345679
Subtract 729 from 730 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 4554.12345679 and a remainder of 1e-09.