424289 divided by 72 
The aim is to understand the frequency of 72 in 424289.

On to step 1:
4 divided by 72 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 72

Step 2:
The number 72 fits into 42 0 times, leaving a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Append the next digit (4) from the dividend to 42 and continue with: 424 / 72

Step 3:
72 can be fit into 424 5 times, resulting in a remainder of 64.
Use 5 as the next digit of our solution. 
Result so far: 5.0
The remainder is 64 after subtracting 360 from 424.
Append the next digit (2) from the dividend to 64 and continue with: 642 / 72

Going ahead to step 4:
642 divided by 72 is 8 with a remainder of 66.
The number 8 becomes the next digit in our result. 
Result so far: 58.0
Deduct 576 from 642 and we're left with 66.
Include the next digit (8) from the dividend after 66, then repeat: 668 / 72

Going ahead to step 5:
72 goes into 668 9 times with a remainder of 20.
Use 9 as the next digit of our solution. 
Result so far: 589.0
Subtracting 648 from 668 leaves us with 20.
Include the next digit (9) from the dividend after 20, then repeat: 209 / 72

Advancing to step 6:
209 divided by 72 is 2 with a remainder of 65.
Write down 2 as next digit of the result. 
Result so far: 5892.0
If we subtract 144 from 209, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 7:
The number 72 fits into 650 9 times, leaving a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 5892.9
Subtracting 648 from 650 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
20 divided by 72 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 5892.9
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
When dividing 200 by 72, we get 2 with a remainder of 56.
The next digit of our result is 2. 
Result so far: 5892.902
Subtracting 144 from 200 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 10:
When dividing 560 by 72, we get 7 with a remainder of 56.
Put 7 as the next digit of the answer. 
Result so far: 5892.9027
The remainder is 56 after subtracting 504 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 11:
72 goes into 560 7 times with a remainder of 56.
Use 7 as the next digit of our solution. 
Result so far: 5892.90277
Subtract 504 from 560 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final result is 5892.90277 with a remainder of 5.6e-05.