We divide 225021 by 72
The aim is to understand the frequency of 72 in 225021.

Going ahead to step 1:
72 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 72

Moving on to step 2:
The number 72 fits into 22 0 times, leaving a remainder of 22.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 22, we get 22.
Grab the next digit (5) from the dividend, add it to 22, then carry on: 225 / 72

On to step 3:
When dividing 225 by 72, we get 3 with a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 216 from 225 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 72

Step 4:
The number 72 fits into 90 1 times, leaving a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
Deduct 72 from 90 and we're left with 18.
Include the next digit (2) from the dividend after 18, then repeat: 182 / 72

Let's proceed to step 5:
The number 72 fits into 182 2 times, leaving a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 312.0
Deduct 144 from 182 and we're left with 38.
Take the next digit (1) from the dividend and append it to 38, then repeat: 381 / 72

Step 6:
381 divided by 72 is 5 with a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 3125.0
If we subtract 360 from 381, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 7:
72 can be fit into 210 2 times, resulting in a remainder of 66.
Use 2 as the next digit of our solution. 
Result so far: 3125.2
If we take 144 away from 210, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 8:
When dividing 660 by 72, we get 9 with a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 3125.29
Deduct 648 from 660 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 9:
120 divided by 72 is 1 with a remainder of 48.
Put 1 as the next digit of the answer. 
Result so far: 3125.291
Deduct 72 from 120 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 10:
72 can be fit into 480 6 times, resulting in a remainder of 48.
Record the quotient 6 as the next digit in the result. 
Result so far: 3125.2916
Subtracting 432 from 480 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 11:
The number 72 fits into 480 6 times, leaving a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 3125.29166
Subtracting 432 from 480 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 3125.29166 with a remainder of 4.8e-05.