38091640 divided by 866 
The aim is to understand the frequency of 866 in 38091640.

Going ahead to step 1:
866 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 866

Advancing to step 2:
866 can be fit into 38 0 times, resulting in a remainder of 38.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 38 after subtracting 0 from 38.
Include the next digit (0) from the dividend after 38, then repeat: 380 / 866

Advancing to step 3:
The number 866 fits into 380 0 times, leaving a remainder of 380.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 380 after subtracting 0 from 380.
Take the next digit (9) from the dividend and append it to 380, then repeat: 3809 / 866

On to step 4:
If we divide 3809 by 866, we get 4 and a remainder of 345.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 3464 away from 3809, we end up with 345.
Fetch the next digit (1) from the dividend, attach it to 345 and continue: 3451 / 866

Going ahead to step 5:
When dividing 3451 by 866, we get 3 with a remainder of 853.
The next digit of our result is 3. 
Result so far: 43.0
Deduct 2598 from 3451 and we're left with 853.
Include the next digit (6) from the dividend after 853, then repeat: 8536 / 866

On to step 6:
The number 866 fits into 8536 9 times, leaving a remainder of 742.
Use 9 as the next digit of our solution. 
Result so far: 439.0
Deduct 7794 from 8536 and we're left with 742.
Include the next digit (4) from the dividend after 742, then repeat: 7424 / 866

Let's proceed to step 7:
If we divide 7424 by 866, we get 8 and a remainder of 496.
Put 8 as the next digit of the answer. 
Result so far: 4398.0
If we subtract 6928 from 7424, we get 496.
Take the next digit (0) from the dividend and append it to 496, then repeat: 4960 / 866

Let's proceed to step 8:
The number 866 fits into 4960 5 times, leaving a remainder of 630.
Write down 5 as next digit of the result. 
Result so far: 43985.0
Deduct 4330 from 4960 and we're left with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Step 9:
866 goes into 6300 7 times with a remainder of 238.
The next digit of our result is 7. 
Result so far: 43985.7
The remainder is 238 after subtracting 6062 from 6300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

On to step 10:
The number 866 fits into 2380 2 times, leaving a remainder of 648.
Write down 2 as next digit of the result. 
Result so far: 43985.72
If we take 1732 away from 2380, we end up with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Advancing to step 11:
When dividing 6480 by 866, we get 7 with a remainder of 418.
The next digit of our result is 7. 
Result so far: 43985.727
Subtract 6062 from 6480 to get 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Let's proceed to step 12:
When dividing 4180 by 866, we get 4 with a remainder of 716.
Write down 4 as next digit of the result. 
Result so far: 43985.7274
If we subtract 3464 from 4180, we get 716.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7160, and continue the process.

Going ahead to step 13:
If we divide 7160 by 866, we get 8 and a remainder of 232.
Use 8 as the next digit of our solution. 
Result so far: 43985.72748
Subtract 6928 from 7160 to get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Advancing to step 14:
866 goes into 2320 2 times with a remainder of 588.
Record the quotient 2 as the next digit in the result. 
Result so far: 43985.727482
Deduct 1732 from 2320 and we're left with 588.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5880, and continue the process.

Advancing to step 15:
866 goes into 5880 6 times with a remainder of 684.
Record the quotient 6 as the next digit in the result. 
Result so far: 43985.7274826
Deduct 5196 from 5880 and we're left with 684.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

Advancing to step 16:
6840 divided by 866 is 7 with a remainder of 778.
Use 7 as the next digit of our solution. 
Result so far: 43985.72748267
Subtracting 6062 from 6840 leaves us with 778.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7780, and continue the process.

In conclusion, the division gives 43985.72748267 with a balance of 7.78e-07.