We divide 214011 by 81
The aim is to understand the frequency of 81 in 214011.

Step 1:
2 divided by 81 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 81

Advancing to step 2:
21 divided by 81 is 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 81

Going ahead to step 3:
The number 81 fits into 214 2 times, leaving a remainder of 52.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 52 after subtracting 162 from 214.
Grab the next digit (0) from the dividend, add it to 52, then carry on: 520 / 81

Step 4:
520 divided by 81 is 6 with a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
Subtracting 486 from 520 leaves us with 34.
Grab the next digit (1) from the dividend, add it to 34, then carry on: 341 / 81

Moving on to step 5:
81 goes into 341 4 times with a remainder of 17.
The number 4 becomes the next digit in our result. 
Result so far: 264.0
If we take 324 away from 341, we end up with 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 81

Going ahead to step 6:
171 divided by 81 is 2 with a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 2642.0
If we take 162 away from 171, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
90 divided by 81 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 2642.1
The remainder is 9 after subtracting 81 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 8:
The number 81 fits into 90 1 times, leaving a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 2642.11
The remainder is 9 after subtracting 81 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

The final result is 2642.11 with a remainder of 0.009.