We're dividing 73045457 by 648 
The aim is to understand the frequency of 648 in 73045457.

On to step 1:
The number 648 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 648

Let's proceed to step 2:
648 goes into 73 0 times with a remainder of 73.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 73, we end up with 73.
Include the next digit (0) from the dividend after 73, then repeat: 730 / 648

Advancing to step 3:
The number 648 fits into 730 1 times, leaving a remainder of 82.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 648 from 730 and we're left with 82.
Bring next digit (4) of the dividend behind the 82 and repeat the process: 824 / 648

Going ahead to step 4:
When dividing 824 by 648, we get 1 with a remainder of 176.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 648 from 824 to get 176.
Bring next digit (5) of the dividend behind the 176 and repeat the process: 1765 / 648

Moving on to step 5:
If we divide 1765 by 648, we get 2 and a remainder of 469.
Use 2 as the next digit of our solution. 
Result so far: 112.0
Subtracting 1296 from 1765 leaves us with 469.
Bring next digit (4) of the dividend behind the 469 and repeat the process: 4694 / 648

Step 6:
When dividing 4694 by 648, we get 7 with a remainder of 158.
The number 7 becomes the next digit in our result. 
Result so far: 1127.0
Subtracting 4536 from 4694 leaves us with 158.
Bring next digit (5) of the dividend behind the 158 and repeat the process: 1585 / 648

Step 7:
648 can be fit into 1585 2 times, resulting in a remainder of 289.
The number 2 becomes the next digit in our result. 
Result so far: 11272.0
Subtract 1296 from 1585 to get 289.
Fetch the next digit (7) from the dividend, attach it to 289 and continue: 2897 / 648

Advancing to step 8:
2897 divided by 648 is 4 with a remainder of 305.
Put 4 as the next digit of the answer. 
Result so far: 112724.0
Subtract 2592 from 2897 to get 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Moving on to step 9:
When dividing 3050 by 648, we get 4 with a remainder of 458.
Record the quotient 4 as the next digit in the result. 
Result so far: 112724.4
Subtract 2592 from 3050 to get 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

On to step 10:
4580 divided by 648 is 7 with a remainder of 44.
The next digit of our result is 7. 
Result so far: 112724.47
Subtracting 4536 from 4580 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 11:
648 can be fit into 440 0 times, resulting in a remainder of 440.
Use 0 as the next digit of our solution. 
Result so far: 112724.47
Deduct 0 from 440 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Let's proceed to step 12:
4400 divided by 648 is 6 with a remainder of 512.
Put 6 as the next digit of the answer. 
Result so far: 112724.4706
Subtracting 3888 from 4400 leaves us with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

On to step 13:
When dividing 5120 by 648, we get 7 with a remainder of 584.
Record the quotient 7 as the next digit in the result. 
Result so far: 112724.47067
Deduct 4536 from 5120 and we're left with 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Advancing to step 14:
648 can be fit into 5840 9 times, resulting in a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 112724.470679
Deduct 5832 from 5840 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 15:
When dividing 80 by 648, we get 0 with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 112724.470679
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 16:
800 divided by 648 is 1 with a remainder of 152.
Write down 1 as next digit of the result. 
Result so far: 112724.47067901
Subtracting 648 from 800 leaves us with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

In conclusion, the division gives 112724.47067901 with a balance of 1.52e-07.