354171 divided by 30 
The aim is to understand the frequency of 30 in 354171.

Step 1:
When dividing 3 by 30, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 30

Let's proceed to step 2:
35 divided by 30 is 1 with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 5 after subtracting 30 from 35.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 30

Advancing to step 3:
30 goes into 54 1 times with a remainder of 24.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 24 after subtracting 30 from 54.
Fetch the next digit (1) from the dividend, attach it to 24 and continue: 241 / 30

Let's proceed to step 4:
30 can be fit into 241 8 times, resulting in a remainder of 1.
Write down 8 as next digit of the result. 
Result so far: 118.0
If we take 240 away from 241, we end up with 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 30

Advancing to step 5:
If we divide 17 by 30, we get 0 and a remainder of 17.
The next digit of our result is 0. 
Result so far: 1180.0
The remainder is 17 after subtracting 0 from 17.
Append the next digit (1) from the dividend to 17 and continue with: 171 / 30

On to step 6:
The number 30 fits into 171 5 times, leaving a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 11805.0
Deduct 150 from 171 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 7:
30 goes into 210 7 times with a remainder of 0.
The next digit of our result is 7. 
Result so far: 11805.7
If we take 210 away from 210, we end up 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.

Let's proceed to step 8:
0 divided by 30 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 11805.7
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.

Moving on to step 9:
0 divided by 30 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 11805.7
Subtracting 0 from 0 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.

After the division, we end up with 11805.7 and a remainder of 0.0.