Let's divide 12781094 by 81
The aim is to understand the frequency of 81 in 12781094.

Let's proceed to step 1:
81 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 81

Step 2:
When dividing 12 by 81, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 81

Step 3:
127 divided by 81 is 1 with a remainder of 46.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 81 from 127 leaves us with 46.
Take the next digit (8) from the dividend and append it to 46, then repeat: 468 / 81

Step 4:
468 divided by 81 is 5 with a remainder of 63.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 63 after subtracting 405 from 468.
Grab the next digit (1) from the dividend, add it to 63, then carry on: 631 / 81

Going ahead to step 5:
81 goes into 631 7 times with a remainder of 64.
Write down 7 as next digit of the result. 
Result so far: 157.0
Deduct 567 from 631 and we're left with 64.
Fetch the next digit (0) from the dividend, attach it to 64 and continue: 640 / 81

Going ahead to step 6:
The number 81 fits into 640 7 times, leaving a remainder of 73.
Write down 7 as next digit of the result. 
Result so far: 1577.0
If we take 567 away from 640, we end up with 73.
Append the next digit (9) from the dividend to 73 and continue with: 739 / 81

Let's proceed to step 7:
739 divided by 81 is 9 with a remainder of 10.
The next digit of our result is 9. 
Result so far: 15779.0
If we subtract 729 from 739, we get 10.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 81

On to step 8:
When dividing 104 by 81, we get 1 with a remainder of 23.
Write down 1 as next digit of the result. 
Result so far: 157791.0
Deduct 81 from 104 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 9:
81 can be fit into 230 2 times, resulting in a remainder of 68.
Put 2 as the next digit of the answer. 
Result so far: 157791.2
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.

Moving on to step 10:
81 goes into 680 8 times with a remainder of 32.
The next digit of our result is 8. 
Result so far: 157791.28
The remainder is 32 after subtracting 648 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 11:
When dividing 320 by 81, we get 3 with a remainder of 77.
Record the quotient 3 as the next digit in the result. 
Result so far: 157791.283
Deduct 243 from 320 and we're left 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.

Going ahead to step 12:
81 can be fit into 770 9 times, resulting in a remainder of 41.
The number 9 becomes the next digit in our result. 
Result so far: 157791.2839
The remainder is 41 after subtracting 729 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 13:
The number 81 fits into 410 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 157791.28395
Subtract 405 from 410 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 14:
81 can be fit into 50 0 times, resulting in a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 157791.28395
Deduct 0 from 50 and we're left with 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 15:
500 divided by 81 is 6 with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 157791.2839506
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.

Advancing to step 16:
If we divide 140 by 81, we get 1 and a remainder of 59.
The next digit of our result is 1. 
Result so far: 157791.28395061
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.

The final result is 157791.28395061 with a remainder of 5.9e-08.