Let's divide 645213 by 72
The aim is to understand the frequency of 72 in 645213.

Advancing to step 1:
72 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 72

On to step 2:
72 goes into 64 0 times with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Fetch the next digit (5) from the dividend, attach it to 64 and continue: 645 / 72

Let's proceed to step 3:
The number 72 fits into 645 8 times, leaving a remainder of 69.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we take 576 away from 645, we end up with 69.
Grab the next digit (2) from the dividend, add it to 69, then carry on: 692 / 72

Moving on to step 4:
692 divided by 72 is 9 with a remainder of 44.
The number 9 becomes the next digit in our result. 
Result so far: 89.0
If we take 648 away from 692, we end up with 44.
Bring next digit (1) of the dividend behind the 44 and repeat the process: 441 / 72

Going ahead to step 5:
The number 72 fits into 441 6 times, leaving a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 896.0
Subtracting 432 from 441 leaves us with 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 72

Going ahead to step 6:
The number 72 fits into 93 1 times, leaving a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 8961.0
If we take 72 away from 93, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 7:
72 goes into 210 2 times with a remainder of 66.
The next digit of our result is 2. 
Result so far: 8961.2
The remainder is 66 after subtracting 144 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 8:
When dividing 660 by 72, we get 9 with a remainder of 12.
Record the quotient 9 as the next digit in the result. 
Result so far: 8961.29
If we take 648 away from 660, we end up 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.

On to step 9:
If we divide 120 by 72, we get 1 and a remainder of 48.
Record the quotient 1 as the next digit in the result. 
Result so far: 8961.291
The remainder is 48 after subtracting 72 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 10:
72 goes into 480 6 times with a remainder of 48.
The next digit of our result is 6. 
Result so far: 8961.2916
If we subtract 432 from 480, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 11:
When dividing 480 by 72, we get 6 with a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 8961.29166
Subtract 432 from 480 to get 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 quotient of the division is 8961.29166, and the remainder is 4.8e-05.