We divide 450663 by 81
The aim is to understand the frequency of 81 in 450663.

Advancing to step 1:
4 divided by 81 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 81

Going ahead to step 2:
81 can be fit into 45 0 times, resulting in a remainder of 45.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 45 after subtracting 0 from 45.
Bring next digit (0) of the dividend behind the 45 and repeat the process: 450 / 81

On to step 3:
450 divided by 81 is 5 with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we take 405 away from 450, we end up with 45.
Include the next digit (6) from the dividend after 45, then repeat: 456 / 81

Advancing to step 4:
The number 81 fits into 456 5 times, leaving a remainder of 51.
The next digit of our result is 5. 
Result so far: 55.0
If we subtract 405 from 456, we get 51.
Fetch the next digit (6) from the dividend, attach it to 51 and continue: 516 / 81

Let's proceed to step 5:
516 divided by 81 is 6 with a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 556.0
If we take 486 away from 516, we end up with 30.
Append the next digit (3) from the dividend to 30 and continue with: 303 / 81

Going ahead to step 6:
303 divided by 81 is 3 with a remainder of 60.
The number 3 becomes the next digit in our result. 
Result so far: 5563.0
If we take 243 away from 303, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 7:
600 divided by 81 is 7 with a remainder of 33.
Record the quotient 7 as the next digit in the result. 
Result so far: 5563.7
If we subtract 567 from 600, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 8:
When dividing 330 by 81, we get 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 5563.74
If we take 324 away from 330, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 9:
81 can be fit into 60 0 times, resulting in a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 5563.74
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 10:
81 goes into 600 7 times with a remainder of 33.
The next digit of our result is 7. 
Result so far: 5563.7407
Deduct 567 from 600 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 11:
81 goes into 330 4 times with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 5563.74074
If we take 324 away from 330, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 12:
81 can be fit into 60 0 times, resulting in a remainder of 60.
The next digit of our result is 0. 
Result so far: 5563.74074
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 13:
The number 81 fits into 600 7 times, leaving a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 5563.7407407
Deduct 567 from 600 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 14:
81 can be fit into 330 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 5563.74074074
Subtract 324 from 330 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

In conclusion, the division gives 5563.74074074 with a balance of 6e-09.