We divide 8624316 by 225
The aim is to understand the frequency of 225 in 8624316.

On to step 1:
8 divided by 225 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 225

Going ahead to step 2:
225 goes into 86 0 times with a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Fetch the next digit (2) from the dividend, attach it to 86 and continue: 862 / 225

Advancing to step 3:
If we divide 862 by 225, we get 3 and a remainder of 187.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 675 from 862 and we're left with 187.
Bring next digit (4) of the dividend behind the 187 and repeat the process: 1874 / 225

Step 4:
The number 225 fits into 1874 8 times, leaving a remainder of 74.
Put 8 as the next digit of the answer. 
Result so far: 38.0
If we subtract 1800 from 1874, we get 74.
Include the next digit (3) from the dividend after 74, then repeat: 743 / 225

Advancing to step 5:
When dividing 743 by 225, we get 3 with a remainder of 68.
Write down 3 as next digit of the result. 
Result so far: 383.0
Subtract 675 from 743 to get 68.
Take the next digit (1) from the dividend and append it to 68, then repeat: 681 / 225

On to step 6:
681 divided by 225 is 3 with a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 3833.0
The remainder is 6 after subtracting 675 from 681.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 225

Going ahead to step 7:
The number 225 fits into 66 0 times, leaving a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 38330.0
Subtract 0 from 66 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 8:
The number 225 fits into 660 2 times, leaving a remainder of 210.
Use 2 as the next digit of our solution. 
Result so far: 38330.2
Subtract 450 from 660 to get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 9:
When dividing 2100 by 225, we get 9 with a remainder of 75.
The next digit of our result is 9. 
Result so far: 38330.29
If we take 2025 away from 2100, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 10:
The number 225 fits into 750 3 times, leaving a remainder of 75.
Put 3 as the next digit of the answer. 
Result so far: 38330.293
Deduct 675 from 750 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 11:
When dividing 750 by 225, we get 3 with a remainder of 75.
Record the quotient 3 as the next digit in the result. 
Result so far: 38330.2933
If we subtract 675 from 750, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

The final result is 38330.2933 with a remainder of 0.00075.