87002409 divided by 23 
The aim is to understand the frequency of 23 in 87002409.

On to step 1:
The number 23 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 23

Let's proceed to step 2:
23 can be fit into 87 3 times, resulting in a remainder of 18.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 18 after subtracting 69 from 87.
Append the next digit (0) from the dividend to 18 and continue with: 180 / 23

Moving on to step 3:
If we divide 180 by 23, we get 7 and a remainder of 19.
The next digit of our result is 7. 
Result so far: 37.0
Deduct 161 from 180 and we're left with 19.
Take the next digit (0) from the dividend and append it to 19, then repeat: 190 / 23

Step 4:
If we divide 190 by 23, we get 8 and a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 378.0
Subtract 184 from 190 to get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 23

On to step 5:
If we divide 62 by 23, we get 2 and a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 3782.0
Subtract 46 from 62 to get 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 23

Advancing to step 6:
23 goes into 164 7 times with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 37827.0
Deduct 161 from 164 and we're left with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 23

Going ahead to step 7:
23 can be fit into 30 1 times, resulting in a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 378271.0
If we subtract 23 from 30, we get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 23

On to step 8:
If we divide 79 by 23, we get 3 and a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 3782713.0
Subtracting 69 from 79 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
When dividing 100 by 23, we get 4 with a remainder of 8.
The next digit of our result is 4. 
Result so far: 3782713.4
The remainder is 8 after subtracting 92 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 10:
When dividing 80 by 23, we get 3 with a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 3782713.43
The remainder is 11 after subtracting 69 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 11:
The number 23 fits into 110 4 times, leaving a remainder of 18.
The next digit of our result is 4. 
Result so far: 3782713.434
If we subtract 92 from 110, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 12:
23 can be fit into 180 7 times, resulting in a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 3782713.4347
If we take 161 away from 180, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 13:
When dividing 190 by 23, we get 8 with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 3782713.43478
The remainder is 6 after subtracting 184 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 14:
The number 23 fits into 60 2 times, leaving a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 3782713.434782
Deduct 46 from 60 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 15:
If we divide 140 by 23, we get 6 and a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 3782713.4347826
If we subtract 138 from 140, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 16:
If we divide 20 by 23, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 3782713.4347826
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 3782713.4347826 with a remaining 2e-08.