We divide 385312 by 21
The aim is to understand the frequency of 21 in 385312.

Advancing to step 1:
21 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 21

On to step 2:
21 goes into 38 1 times with a remainder of 17.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 21 from 38 to get 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 21

Moving on to step 3:
21 can be fit into 175 8 times, resulting in a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
Deduct 168 from 175 and we're left with 7.
Take the next digit (3) from the dividend and append it to 7, then repeat: 73 / 21

Moving on to step 4:
If we divide 73 by 21, we get 3 and a remainder of 10.
The next digit of our result is 3. 
Result so far: 183.0
If we take 63 away from 73, we end up with 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 21

Moving on to step 5:
The number 21 fits into 101 4 times, leaving a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 1834.0
Subtract 84 from 101 to get 17.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 21

Let's proceed to step 6:
21 goes into 172 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 18348.0
If we subtract 168 from 172, we 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.

On to step 7:
21 can be fit into 40 1 times, resulting in a remainder of 19.
The next digit of our result is 1. 
Result so far: 18348.1
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.

Advancing to step 8:
When dividing 190 by 21, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 18348.19
Subtract 189 from 190 to 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:
If we divide 10 by 21, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 18348.19
If we take 0 away from 10, we end up 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 10:
The number 21 fits into 100 4 times, leaving a remainder of 16.
The next digit of our result is 4. 
Result so far: 18348.1904
Deduct 84 from 100 and we're left 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.

Step 11:
If we divide 160 by 21, we get 7 and a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 18348.19047
The remainder is 13 after subtracting 147 from 160.
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:
130 divided by 21 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 18348.190476
Subtract 126 from 130 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.

Advancing to step 13:
If we divide 40 by 21, we get 1 and a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 18348.1904761
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.

Going ahead to step 14:
190 divided by 21 is 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 18348.19047619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 18348.19047619 with a remainder of 1e-09.