81972365 divided by 491 
The aim is to understand the frequency of 491 in 81972365.

Let's proceed to step 1:
If we divide 8 by 491, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 491

On to step 2:
If we divide 81 by 491, we get 0 and a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Bring next digit (9) of the dividend behind the 81 and repeat the process: 819 / 491

Going ahead to step 3:
If we divide 819 by 491, we get 1 and a remainder of 328.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 491 from 819 leaves us with 328.
Include the next digit (7) from the dividend after 328, then repeat: 3287 / 491

On to step 4:
If we divide 3287 by 491, we get 6 and a remainder of 341.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 2946 from 3287, we get 341.
Append the next digit (2) from the dividend to 341 and continue with: 3412 / 491

On to step 5:
The number 491 fits into 3412 6 times, leaving a remainder of 466.
Write down 6 as next digit of the result. 
Result so far: 166.0
Subtract 2946 from 3412 to get 466.
Append the next digit (3) from the dividend to 466 and continue with: 4663 / 491

Advancing to step 6:
If we divide 4663 by 491, we get 9 and a remainder of 244.
Record the quotient 9 as the next digit in the result. 
Result so far: 1669.0
Subtract 4419 from 4663 to get 244.
Append the next digit (6) from the dividend to 244 and continue with: 2446 / 491

Going ahead to step 7:
2446 divided by 491 is 4 with a remainder of 482.
Use 4 as the next digit of our solution. 
Result so far: 16694.0
If we subtract 1964 from 2446, we get 482.
Take the next digit (5) from the dividend and append it to 482, then repeat: 4825 / 491

On to step 8:
491 can be fit into 4825 9 times, resulting in a remainder of 406.
The next digit of our result is 9. 
Result so far: 166949.0
If we take 4419 away from 4825, we end up with 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Advancing to step 9:
491 goes into 4060 8 times with a remainder of 132.
The next digit of our result is 8. 
Result so far: 166949.8
If we take 3928 away from 4060, we end up with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

On to step 10:
If we divide 1320 by 491, we get 2 and a remainder of 338.
Record the quotient 2 as the next digit in the result. 
Result so far: 166949.82
If we take 982 away from 1320, we end up with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

On to step 11:
491 goes into 3380 6 times with a remainder of 434.
Use 6 as the next digit of our solution. 
Result so far: 166949.826
Subtract 2946 from 3380 to get 434.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

Advancing to step 12:
491 can be fit into 4340 8 times, resulting in a remainder of 412.
Use 8 as the next digit of our solution. 
Result so far: 166949.8268
If we take 3928 away from 4340, we end up with 412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

Let's proceed to step 13:
4120 divided by 491 is 8 with a remainder of 192.
The next digit of our result is 8. 
Result so far: 166949.82688
Subtracting 3928 from 4120 leaves us with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

The final result is 166949.82688 with a remainder of 0.000192.