We divide 829351 by 21
The aim is to understand the frequency of 21 in 829351.

On to step 1:
If we divide 8 by 21, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 21

Step 2:
21 goes into 82 3 times with a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 63 from 82 to get 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 21

On to step 3:
199 divided by 21 is 9 with a remainder of 10.
The next digit of our result is 9. 
Result so far: 39.0
Deduct 189 from 199 and we're left with 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 21

On to step 4:
21 can be fit into 103 4 times, resulting in a remainder of 19.
Put 4 as the next digit of the answer. 
Result so far: 394.0
Deduct 84 from 103 and we're left with 19.
Fetch the next digit (5) from the dividend, attach it to 19 and continue: 195 / 21

Moving on to step 5:
21 can be fit into 195 9 times, resulting in a remainder of 6.
The next digit of our result is 9. 
Result so far: 3949.0
If we subtract 189 from 195, we get 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 21

Going ahead to step 6:
If we divide 61 by 21, we get 2 and a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 39492.0
The remainder is 19 after subtracting 42 from 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
190 divided by 21 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 39492.9
If we take 189 away from 190, we end up 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.

Going ahead to step 8:
When dividing 10 by 21, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 39492.9
Subtracting 0 from 10 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.

Let's proceed to step 9:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 39492.904
Subtract 84 from 100 to get 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 10:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 39492.9047
Subtracting 147 from 160 leaves us 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 11:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 39492.90476
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
21 goes into 40 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 39492.904761
If we subtract 21 from 40, we get 19.
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 13:
When dividing 190 by 21, we get 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 39492.9047619
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.

On to step 14:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 39492.9047619
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

In conclusion, the division gives 39492.9047619 with a balance of 1e-08.