396105 divided by 72 
The aim is to understand the frequency of 72 in 396105.

Advancing to step 1:
The number 72 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 72

Step 2:
The number 72 fits into 39 0 times, leaving a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Fetch the next digit (6) from the dividend, attach it to 39 and continue: 396 / 72

Step 3:
If we divide 396 by 72, we get 5 and a remainder of 36.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 360 from 396 to get 36.
Fetch the next digit (1) from the dividend, attach it to 36 and continue: 361 / 72

Step 4:
The number 72 fits into 361 5 times, leaving a remainder of 1.
The next digit of our result is 5. 
Result so far: 55.0
The remainder is 1 after subtracting 360 from 361.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 72

Going ahead to step 5:
The number 72 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 550.0
Subtracting 0 from 10 leaves us with 10.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 72

On to step 6:
72 can be fit into 105 1 times, resulting in a remainder of 33.
Use 1 as the next digit of our solution. 
Result so far: 5501.0
Deduct 72 from 105 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 7:
If we divide 330 by 72, we get 4 and a remainder of 42.
Use 4 as the next digit of our solution. 
Result so far: 5501.4
If we subtract 288 from 330, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
When dividing 420 by 72, we get 5 with a remainder of 60.
The next digit of our result is 5. 
Result so far: 5501.45
Subtracting 360 from 420 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
600 divided by 72 is 8 with a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 5501.458
If we subtract 576 from 600, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 10:
When dividing 240 by 72, we get 3 with a remainder of 24.
The next digit of our result is 3. 
Result so far: 5501.4583
Subtract 216 from 240 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 11:
When dividing 240 by 72, we get 3 with a remainder of 24.
Record the quotient 3 as the next digit in the result. 
Result so far: 5501.45833
The remainder is 24 after subtracting 216 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 5501.45833 with a remainder of 2.4e-05.