Let's divide 45843921 by 648
The aim is to understand the frequency of 648 in 45843921.

Let's proceed to step 1:
If we divide 4 by 648, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 648

On to step 2:
The number 648 fits into 45 0 times, leaving a remainder of 45.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 45 to get 45.
Take the next digit (8) from the dividend and append it to 45, then repeat: 458 / 648

Advancing to step 3:
648 can be fit into 458 0 times, resulting in a remainder of 458.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 458, we end up with 458.
Grab the next digit (4) from the dividend, add it to 458, then carry on: 4584 / 648

Let's proceed to step 4:
When dividing 4584 by 648, we get 7 with a remainder of 48.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 4536 from 4584 and we're left with 48.
Take the next digit (3) from the dividend and append it to 48, then repeat: 483 / 648

Going ahead to step 5:
If we divide 483 by 648, we get 0 and a remainder of 483.
Write down 0 as next digit of the result. 
Result so far: 70.0
Subtract 0 from 483 to get 483.
Bring next digit (9) of the dividend behind the 483 and repeat the process: 4839 / 648

Let's proceed to step 6:
648 goes into 4839 7 times with a remainder of 303.
The next digit of our result is 7. 
Result so far: 707.0
If we take 4536 away from 4839, we end up with 303.
Fetch the next digit (2) from the dividend, attach it to 303 and continue: 3032 / 648

Advancing to step 7:
The number 648 fits into 3032 4 times, leaving a remainder of 440.
The number 4 becomes the next digit in our result. 
Result so far: 7074.0
The remainder is 440 after subtracting 2592 from 3032.
Take the next digit (1) from the dividend and append it to 440, then repeat: 4401 / 648

On to step 8:
4401 divided by 648 is 6 with a remainder of 513.
Put 6 as the next digit of the answer. 
Result so far: 70746.0
Subtract 3888 from 4401 to get 513.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5130, and continue the process.

Let's proceed to step 9:
If we divide 5130 by 648, we get 7 and a remainder of 594.
Use 7 as the next digit of our solution. 
Result so far: 70746.7
If we take 4536 away from 5130, we end up with 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Advancing to step 10:
5940 divided by 648 is 9 with a remainder of 108.
Put 9 as the next digit of the answer. 
Result so far: 70746.79
If we take 5832 away from 5940, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Step 11:
When dividing 1080 by 648, we get 1 with a remainder of 432.
The number 1 becomes the next digit in our result. 
Result so far: 70746.791
If we subtract 648 from 1080, we get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Moving on to step 12:
The number 648 fits into 4320 6 times, leaving a remainder of 432.
The number 6 becomes the next digit in our result. 
Result so far: 70746.7916
Subtracting 3888 from 4320 leaves us with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Let's proceed to step 13:
648 can be fit into 4320 6 times, resulting in a remainder of 432.
The next digit of our result is 6. 
Result so far: 70746.79166
If we subtract 3888 from 4320, we get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

The final result is 70746.79166 with a remainder of 0.000432.