We're dividing 544471 by 21 
The aim is to understand the frequency of 21 in 544471.

Going ahead to step 1:
When dividing 5 by 21, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 21

Moving on to step 2:
21 can be fit into 54 2 times, resulting in a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 42 away from 54, we end up with 12.
Take the next digit (4) from the dividend and append it to 12, then repeat: 124 / 21

On to step 3:
21 can be fit into 124 5 times, resulting in a remainder of 19.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
The remainder is 19 after subtracting 105 from 124.
Append the next digit (4) from the dividend to 19 and continue with: 194 / 21

Step 4:
The number 21 fits into 194 9 times, leaving a remainder of 5.
Use 9 as the next digit of our solution. 
Result so far: 259.0
Subtract 189 from 194 to get 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 21

Going ahead to step 5:
57 divided by 21 is 2 with a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 2592.0
Subtract 42 from 57 to get 15.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 21

Advancing to step 6:
21 can be fit into 151 7 times, resulting in a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 25927.0
Subtract 147 from 151 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 25927.1
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 25927.19
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 25927.19
Deduct 0 from 10 and we're left 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.

Let's proceed to step 10:
If we divide 100 by 21, we get 4 and a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 25927.1904
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 11:
160 divided by 21 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 25927.19047
Deduct 147 from 160 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 12:
When dividing 130 by 21, we get 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 25927.190476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 13:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 25927.1904761
Subtracting 21 from 40 leaves us 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.

Let's proceed to step 14:
21 goes into 190 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 25927.19047619
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

In conclusion, the division gives 25927.19047619 with a balance of 1e-09.