We're dividing 39306213 by 225 
The aim is to understand the frequency of 225 in 39306213.

Moving on to step 1:
The number 225 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 225

Advancing to step 2:
225 goes into 39 0 times with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Bring next digit (3) of the dividend behind the 39 and repeat the process: 393 / 225

Going ahead to step 3:
393 divided by 225 is 1 with a remainder of 168.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 225 from 393 leaves us with 168.
Append the next digit (0) from the dividend to 168 and continue with: 1680 / 225

Step 4:
225 goes into 1680 7 times with a remainder of 105.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Deduct 1575 from 1680 and we're left with 105.
Bring next digit (6) of the dividend behind the 105 and repeat the process: 1056 / 225

Step 5:
1056 divided by 225 is 4 with a remainder of 156.
Use 4 as the next digit of our solution. 
Result so far: 174.0
Subtract 900 from 1056 to get 156.
Fetch the next digit (2) from the dividend, attach it to 156 and continue: 1562 / 225

On to step 6:
When dividing 1562 by 225, we get 6 with a remainder of 212.
The next digit of our result is 6. 
Result so far: 1746.0
Deduct 1350 from 1562 and we're left with 212.
Fetch the next digit (1) from the dividend, attach it to 212 and continue: 2121 / 225

Moving on to step 7:
The number 225 fits into 2121 9 times, leaving a remainder of 96.
Record the quotient 9 as the next digit in the result. 
Result so far: 17469.0
Deduct 2025 from 2121 and we're left with 96.
Include the next digit (3) from the dividend after 96, then repeat: 963 / 225

Advancing to step 8:
The number 225 fits into 963 4 times, leaving a remainder of 63.
The number 4 becomes the next digit in our result. 
Result so far: 174694.0
Subtracting 900 from 963 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 9:
225 goes into 630 2 times with a remainder of 180.
Record the quotient 2 as the next digit in the result. 
Result so far: 174694.2
Subtracting 450 from 630 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Going ahead to step 10:
If we divide 1800 by 225, we get 8 and a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 174694.28
Subtract 1800 from 1800 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.

Let's proceed to step 11:
225 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 174694.28
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 12:
225 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 174694.28
Deduct 0 from 0 and we're left 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.

The final result is 174694.28 with a remainder of 0.0.