We divide 484451 by 21
The aim is to understand the frequency of 21 in 484451.

Let's proceed to step 1:
21 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 21

Advancing to step 2:
48 divided by 21 is 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 6 after subtracting 42 from 48.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 21

Moving on to step 3:
21 goes into 64 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
The remainder is 1 after subtracting 63 from 64.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 21

Advancing to step 4:
If we divide 14 by 21, we get 0 and a remainder of 14.
The next digit of our result is 0. 
Result so far: 230.0
Subtract 0 from 14 to get 14.
Append the next digit (5) from the dividend to 14 and continue with: 145 / 21

Moving on to step 5:
145 divided by 21 is 6 with a remainder of 19.
The number 6 becomes the next digit in our result. 
Result so far: 2306.0
If we subtract 126 from 145, we get 19.
Grab the next digit (1) from the dividend, add it to 19, then carry on: 191 / 21

Let's proceed to step 6:
When dividing 191 by 21, we get 9 with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 23069.0
If we take 189 away from 191, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
21 goes into 20 0 times with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 23069.0
Deduct 0 from 20 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.

Let's proceed to step 8:
If we divide 200 by 21, we get 9 and a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 23069.09
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 9:
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: 23069.095
If we take 105 away from 110, we end up 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.

Step 10:
If we divide 50 by 21, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 23069.0952
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.

Going ahead to step 11:
21 goes into 80 3 times with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 23069.09523
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 12:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The next digit of our result is 8. 
Result so far: 23069.095238
If we subtract 168 from 170, 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.

Going ahead to step 13:
When dividing 20 by 21, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 23069.095238
Deduct 0 from 20 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.

Let's proceed to step 14:
If we divide 200 by 21, we get 9 and a remainder of 11.
The next digit of our result is 9. 
Result so far: 23069.09523809
Deduct 189 from 200 and we're left 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.

The quotient of the division is 23069.09523809, and the remainder is 1.1e-08.