Let's divide 81092185 by 660
The aim is to understand the frequency of 660 in 81092185.

Going ahead to step 1:
When dividing 8 by 660, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 660

On to step 2:
81 divided by 660 is 0 with a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Fetch the next digit (0) from the dividend, attach it to 81 and continue: 810 / 660

Moving on to step 3:
If we divide 810 by 660, we get 1 and a remainder of 150.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 660 from 810, we get 150.
Include the next digit (9) from the dividend after 150, then repeat: 1509 / 660

Let's proceed to step 4:
If we divide 1509 by 660, we get 2 and a remainder of 189.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtract 1320 from 1509 to get 189.
Include the next digit (2) from the dividend after 189, then repeat: 1892 / 660

Let's proceed to step 5:
When dividing 1892 by 660, we get 2 with a remainder of 572.
The number 2 becomes the next digit in our result. 
Result so far: 122.0
If we take 1320 away from 1892, we end up with 572.
Take the next digit (1) from the dividend and append it to 572, then repeat: 5721 / 660

Moving on to step 6:
660 can be fit into 5721 8 times, resulting in a remainder of 441.
The next digit of our result is 8. 
Result so far: 1228.0
If we take 5280 away from 5721, we end up with 441.
Bring next digit (8) of the dividend behind the 441 and repeat the process: 4418 / 660

On to step 7:
The number 660 fits into 4418 6 times, leaving a remainder of 458.
The number 6 becomes the next digit in our result. 
Result so far: 12286.0
If we take 3960 away from 4418, we end up with 458.
Bring next digit (5) of the dividend behind the 458 and repeat the process: 4585 / 660

Let's proceed to step 8:
660 can be fit into 4585 6 times, resulting in a remainder of 625.
The next digit of our result is 6. 
Result so far: 122866.0
If we subtract 3960 from 4585, we get 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Moving on to step 9:
When dividing 6250 by 660, we get 9 with a remainder of 310.
Use 9 as the next digit of our solution. 
Result so far: 122866.9
Subtract 5940 from 6250 to get 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Advancing to step 10:
The number 660 fits into 3100 4 times, leaving a remainder of 460.
Use 4 as the next digit of our solution. 
Result so far: 122866.94
Subtract 2640 from 3100 to get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Step 11:
If we divide 4600 by 660, we get 6 and a remainder of 640.
The number 6 becomes the next digit in our result. 
Result so far: 122866.946
The remainder is 640 after subtracting 3960 from 4600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Let's proceed to step 12:
When dividing 6400 by 660, we get 9 with a remainder of 460.
Put 9 as the next digit of the answer. 
Result so far: 122866.9469
The remainder is 460 after subtracting 5940 from 6400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

On to step 13:
4600 divided by 660 is 6 with a remainder of 640.
Record the quotient 6 as the next digit in the result. 
Result so far: 122866.94696
The remainder is 640 after subtracting 3960 from 4600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Advancing to step 14:
6400 divided by 660 is 9 with a remainder of 460.
Put 9 as the next digit of the answer. 
Result so far: 122866.946969
The remainder is 460 after subtracting 5940 from 6400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

On to step 15:
660 can be fit into 4600 6 times, resulting in a remainder of 640.
Use 6 as the next digit of our solution. 
Result so far: 122866.9469696
The remainder is 640 after subtracting 3960 from 4600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Step 16:
The number 660 fits into 6400 9 times, leaving a remainder of 460.
The number 9 becomes the next digit in our result. 
Result so far: 122866.94696969
If we subtract 5940 from 6400, we get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Our division results in 122866.94696969 with a remaining 4.6e-07.