We're dividing 840402 by 30 
The aim is to understand the frequency of 30 in 840402.

Let's proceed to step 1:
30 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 30

Going ahead to step 2:
When dividing 84 by 30, we get 2 with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 60 from 84 and we're left with 24.
Take the next digit (0) from the dividend and append it to 24, then repeat: 240 / 30

Going ahead to step 3:
30 goes into 240 8 times with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
If we take 240 away from 240, we end up with 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 30

Step 4:
The number 30 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 280.0
Subtract 0 from 4 to get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 30

Going ahead to step 5:
30 can be fit into 40 1 times, resulting in a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 2801.0
Subtract 30 from 40 to get 10.
Take the next digit (2) from the dividend and append it to 10, then repeat: 102 / 30

Moving on to step 6:
30 can be fit into 102 3 times, resulting in a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 28013.0
If we subtract 90 from 102, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
30 can be fit into 120 4 times, resulting in a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 28013.4
Subtracting 120 from 120 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
If we divide 0 by 30, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 28013.4
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
30 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 28013.4
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 28013.4 with a remainder of 0.0.