Let's divide 23421405 by 866
The aim is to understand the frequency of 866 in 23421405.

On to step 1:
The number 866 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 866

Step 2:
866 goes into 23 0 times with a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 23 to get 23.
Fetch the next digit (4) from the dividend, attach it to 23 and continue: 234 / 866

Moving on to step 3:
The number 866 fits into 234 0 times, leaving a remainder of 234.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 234 leaves us with 234.
Take the next digit (2) from the dividend and append it to 234, then repeat: 2342 / 866

Moving on to step 4:
When dividing 2342 by 866, we get 2 with a remainder of 610.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 1732 away from 2342, we end up with 610.
Fetch the next digit (1) from the dividend, attach it to 610 and continue: 6101 / 866

On to step 5:
866 goes into 6101 7 times with a remainder of 39.
Write down 7 as next digit of the result. 
Result so far: 27.0
Subtract 6062 from 6101 to get 39.
Take the next digit (4) from the dividend and append it to 39, then repeat: 394 / 866

Going ahead to step 6:
394 divided by 866 is 0 with a remainder of 394.
The next digit of our result is 0. 
Result so far: 270.0
If we subtract 0 from 394, we get 394.
Take the next digit (0) from the dividend and append it to 394, then repeat: 3940 / 866

Moving on to step 7:
866 can be fit into 3940 4 times, resulting in a remainder of 476.
The next digit of our result is 4. 
Result so far: 2704.0
If we take 3464 away from 3940, we end up with 476.
Grab the next digit (5) from the dividend, add it to 476, then carry on: 4765 / 866

Moving on to step 8:
4765 divided by 866 is 5 with a remainder of 435.
The number 5 becomes the next digit in our result. 
Result so far: 27045.0
If we take 4330 away from 4765, we end up with 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

Advancing to step 9:
The number 866 fits into 4350 5 times, leaving a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 27045.5
Deduct 4330 from 4350 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
200 divided by 866 is 0 with a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 27045.5
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 11:
866 goes into 2000 2 times with a remainder of 268.
Put 2 as the next digit of the answer. 
Result so far: 27045.502
Deduct 1732 from 2000 and we're left with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Going ahead to step 12:
The number 866 fits into 2680 3 times, leaving a remainder of 82.
The next digit of our result is 3. 
Result so far: 27045.5023
If we take 2598 away from 2680, we end up with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 13:
866 can be fit into 820 0 times, resulting in a remainder of 820.
Put 0 as the next digit of the answer. 
Result so far: 27045.5023
If we subtract 0 from 820, we get 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8200, and continue the process.

Moving on to step 14:
If we divide 8200 by 866, we get 9 and a remainder of 406.
The number 9 becomes the next digit in our result. 
Result so far: 27045.502309
The remainder is 406 after subtracting 7794 from 8200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Going ahead to step 15:
When dividing 4060 by 866, we get 4 with a remainder of 596.
Write down 4 as next digit of the result. 
Result so far: 27045.5023094
Subtracting 3464 from 4060 leaves us with 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Going ahead to step 16:
866 can be fit into 5960 6 times, resulting in a remainder of 764.
Use 6 as the next digit of our solution. 
Result so far: 27045.50230946
Subtract 5196 from 5960 to get 764.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7640, and continue the process.

In conclusion, the division gives 27045.50230946 with a balance of 7.64e-07.