Let's divide 133169 by 81
The aim is to understand the frequency of 81 in 133169.

Step 1:
81 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 81

Let's proceed to step 2:
13 divided by 81 is 0 with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Bring next digit (3) of the dividend behind the 13 and repeat the process: 133 / 81

Moving on to step 3:
If we divide 133 by 81, we get 1 and a remainder of 52.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 52 after subtracting 81 from 133.
Take the next digit (1) from the dividend and append it to 52, then repeat: 521 / 81

Moving on to step 4:
521 divided by 81 is 6 with a remainder of 35.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
If we take 486 away from 521, we end up with 35.
Take the next digit (6) from the dividend and append it to 35, then repeat: 356 / 81

On to step 5:
If we divide 356 by 81, we get 4 and a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 164.0
Subtract 324 from 356 to get 32.
Fetch the next digit (9) from the dividend, attach it to 32 and continue: 329 / 81

Let's proceed to step 6:
81 can be fit into 329 4 times, resulting in a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 1644.0
Subtract 324 from 329 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.

Going ahead to step 7:
81 can be fit into 50 0 times, resulting in a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 1644.0
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.

On to step 8:
500 divided by 81 is 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 1644.06
Subtract 486 from 500 to 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.

Going ahead to step 9:
When dividing 140 by 81, we get 1 with a remainder of 59.
The next digit of our result is 1. 
Result so far: 1644.061
The remainder is 59 after subtracting 81 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 10:
81 goes into 590 7 times with a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 1644.0617
Deduct 567 from 590 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.

On to step 11:
The number 81 fits into 230 2 times, leaving a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 1644.06172
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.

Step 12:
81 can be fit into 680 8 times, resulting in a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 1644.061728
Subtracting 648 from 680 leaves us 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.

Step 13:
81 goes into 320 3 times with a remainder of 77.
The number 3 becomes the next digit in our result. 
Result so far: 1644.0617283
If we subtract 243 from 320, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 14:
81 goes into 770 9 times with a remainder of 41.
The next digit of our result is 9. 
Result so far: 1644.06172839
Deduct 729 from 770 and we're left 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 quotient of the division is 1644.06172839, and the remainder is 4.1e-08.