Let's divide 184418 by 21
The aim is to understand the frequency of 21 in 184418.

Step 1:
1 divided by 21 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 21

On to step 2:
The number 21 fits into 18 0 times, leaving a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Fetch the next digit (4) from the dividend, attach it to 18 and continue: 184 / 21

Advancing to step 3:
21 can be fit into 184 8 times, resulting in a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 16 after subtracting 168 from 184.
Grab the next digit (4) from the dividend, add it to 16, then carry on: 164 / 21

Let's proceed to step 4:
If we divide 164 by 21, we get 7 and a remainder of 17.
The next digit of our result is 7. 
Result so far: 87.0
Subtracting 147 from 164 leaves us with 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 21

Advancing to step 5:
21 goes into 171 8 times with a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 878.0
Subtract 168 from 171 to get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 21

Moving on to step 6:
38 divided by 21 is 1 with a remainder of 17.
Put 1 as the next digit of the answer. 
Result so far: 8781.0
If we take 21 away from 38, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
If we divide 170 by 21, we get 8 and a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 8781.8
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
When dividing 20 by 21, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 8781.8
If we take 0 away from 20, we end up 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.

Moving on to step 9:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 8781.809
Subtracting 189 from 200 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 10:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 8781.8095
Deduct 105 from 110 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 11:
When dividing 50 by 21, we get 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 8781.80952
Subtracting 42 from 50 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
21 goes into 80 3 times with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 8781.809523
If we take 63 away from 80, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 13:
21 goes into 170 8 times with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 8781.8095238
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 14:
When dividing 20 by 21, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 8781.8095238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 8781.8095238 and a remainder of 2e-08.