We divide 614278 by 21
The aim is to understand the frequency of 21 in 614278.

On to step 1:
If we divide 6 by 21, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 21

Going ahead to step 2:
21 can be fit into 61 2 times, resulting in a remainder of 19.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 42 from 61 and we're left with 19.
Grab the next digit (4) from the dividend, add it to 19, then carry on: 194 / 21

Moving on to step 3:
21 can be fit into 194 9 times, resulting in a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 29.0
If we take 189 away from 194, we end up with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 21

Let's proceed to step 4:
21 can be fit into 52 2 times, resulting in a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 292.0
Deduct 42 from 52 and we're left with 10.
Fetch the next digit (7) from the dividend, attach it to 10 and continue: 107 / 21

Step 5:
The number 21 fits into 107 5 times, leaving a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 2925.0
Subtract 105 from 107 to get 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 21

Let's proceed to step 6:
28 divided by 21 is 1 with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 29251.0
If we take 21 away from 28, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
If we divide 70 by 21, we get 3 and a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 29251.3
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
If we divide 70 by 21, we get 3 and a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 29251.33
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The quotient of the division is 29251.33, and the remainder is 0.007.