405304 divided by 12 
The aim is to understand the frequency of 12 in 405304.

On to step 1:
If we divide 4 by 12, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 12

Let's proceed to step 2:
12 goes into 40 3 times with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 36 from 40 to get 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 12

Advancing to step 3:
If we divide 45 by 12, we get 3 and a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
If we subtract 36 from 45, we get 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 12

Moving on to step 4:
When dividing 93 by 12, we get 7 with a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 337.0
The remainder is 9 after subtracting 84 from 93.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 12

Let's proceed to step 5:
12 goes into 90 7 times with a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 3377.0
The remainder is 6 after subtracting 84 from 90.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 12

Advancing to step 6:
If we divide 64 by 12, we get 5 and a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 33775.0
The remainder is 4 after subtracting 60 from 64.
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:
12 goes into 40 3 times with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 33775.3
Deduct 36 from 40 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
40 divided by 12 is 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 33775.33
If we subtract 36 from 40, 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.

In conclusion, the division gives 33775.33 with a balance of 0.004.