440402 divided by 81 
The aim is to understand the frequency of 81 in 440402.

Let's proceed to step 1:
4 divided by 81 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 81

Advancing to step 2:
The number 81 fits into 44 0 times, leaving a remainder of 44.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 44 to get 44.
Bring next digit (0) of the dividend behind the 44 and repeat the process: 440 / 81

Moving on to step 3:
When dividing 440 by 81, we get 5 with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 35 after subtracting 405 from 440.
Grab the next digit (4) from the dividend, add it to 35, then carry on: 354 / 81

Advancing to step 4:
The number 81 fits into 354 4 times, leaving a remainder of 30.
The next digit of our result is 4. 
Result so far: 54.0
If we subtract 324 from 354, we get 30.
Include the next digit (0) from the dividend after 30, then repeat: 300 / 81

Going ahead to step 5:
300 divided by 81 is 3 with a remainder of 57.
Put 3 as the next digit of the answer. 
Result so far: 543.0
Deduct 243 from 300 and we're left with 57.
Append the next digit (2) from the dividend to 57 and continue with: 572 / 81

Moving on to step 6:
The number 81 fits into 572 7 times, leaving a remainder of 5.
The next digit of our result is 7. 
Result so far: 5437.0
Subtracting 567 from 572 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
81 goes into 50 0 times with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 5437.0
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
81 can be fit into 500 6 times, resulting in a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 5437.06
If we subtract 486 from 500, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 9:
If we divide 140 by 81, we get 1 and a remainder of 59.
The number 1 becomes the next digit in our result. 
Result so far: 5437.061
Subtracting 81 from 140 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 10:
When dividing 590 by 81, we get 7 with a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 5437.0617
If we subtract 567 from 590, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 11:
230 divided by 81 is 2 with a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 5437.06172
Subtract 162 from 230 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 12:
If we divide 680 by 81, we get 8 and a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 5437.061728
Deduct 648 from 680 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 13:
320 divided by 81 is 3 with a remainder of 77.
Write down 3 as next digit of the result. 
Result so far: 5437.0617283
Subtracting 243 from 320 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Step 14:
If we divide 770 by 81, we get 9 and a remainder of 41.
Use 9 as the next digit of our solution. 
Result so far: 5437.06172839
If we take 729 away from 770, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

The final result is 5437.06172839 with a remainder of 4.1e-08.