302357 ÷ 30 
The aim is to understand the frequency of 30 in 302357.

On to step 1:
The number 30 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 30

Step 2:
30 goes into 30 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 0 after subtracting 30 from 30.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 30

Advancing to step 3:
2 divided by 30 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 10.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 30

Moving on to step 4:
If we divide 23 by 30, we get 0 and a remainder of 23.
Write down 0 as next digit of the result. 
Result so far: 100.0
If we subtract 0 from 23, we get 23.
Grab the next digit (5) from the dividend, add it to 23, then carry on: 235 / 30

On to step 5:
When dividing 235 by 30, we get 7 with a remainder of 25.
The number 7 becomes the next digit in our result. 
Result so far: 1007.0
Subtract 210 from 235 to get 25.
Bring next digit (7) of the dividend behind the 25 and repeat the process: 257 / 30

Let's proceed to step 6:
257 divided by 30 is 8 with a remainder of 17.
Put 8 as the next digit of the answer. 
Result so far: 10078.0
The remainder is 17 after subtracting 240 from 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 7:
170 divided by 30 is 5 with a remainder of 20.
Record the quotient 5 as the next digit in the result. 
Result so far: 10078.5
Deduct 150 from 170 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 8:
When dividing 200 by 30, we get 6 with a remainder of 20.
The next digit of our result is 6. 
Result so far: 10078.56
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
When dividing 200 by 30, we get 6 with a remainder of 20.
The next digit of our result is 6. 
Result so far: 10078.566
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 10078.566 and a remainder of 0.002.