We divide 21546736 by 648
The aim is to understand the frequency of 648 in 21546736.

Advancing to step 1:
The number 648 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 648

Let's proceed to step 2:
When dividing 21 by 648, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 648

On to step 3:
If we divide 215 by 648, we get 0 and a remainder of 215.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 215 after subtracting 0 from 215.
Take the next digit (4) from the dividend and append it to 215, then repeat: 2154 / 648

On to step 4:
When dividing 2154 by 648, we get 3 with a remainder of 210.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 1944 from 2154 and we're left with 210.
Take the next digit (6) from the dividend and append it to 210, then repeat: 2106 / 648

Moving on to step 5:
648 can be fit into 2106 3 times, resulting in a remainder of 162.
The next digit of our result is 3. 
Result so far: 33.0
The remainder is 162 after subtracting 1944 from 2106.
Include the next digit (7) from the dividend after 162, then repeat: 1627 / 648

Going ahead to step 6:
The number 648 fits into 1627 2 times, leaving a remainder of 331.
Put 2 as the next digit of the answer. 
Result so far: 332.0
If we subtract 1296 from 1627, we get 331.
Fetch the next digit (3) from the dividend, attach it to 331 and continue: 3313 / 648

On to step 7:
When dividing 3313 by 648, we get 5 with a remainder of 73.
Put 5 as the next digit of the answer. 
Result so far: 3325.0
Subtracting 3240 from 3313 leaves us with 73.
Include the next digit (6) from the dividend after 73, then repeat: 736 / 648

Going ahead to step 8:
648 goes into 736 1 times with a remainder of 88.
Use 1 as the next digit of our solution. 
Result so far: 33251.0
Subtracting 648 from 736 leaves us with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Going ahead to step 9:
648 goes into 880 1 times with a remainder of 232.
Write down 1 as next digit of the result. 
Result so far: 33251.1
The remainder is 232 after subtracting 648 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

On to step 10:
648 goes into 2320 3 times with a remainder of 376.
The number 3 becomes the next digit in our result. 
Result so far: 33251.13
Subtracting 1944 from 2320 leaves us with 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Going ahead to step 11:
The number 648 fits into 3760 5 times, leaving a remainder of 520.
Record the quotient 5 as the next digit in the result. 
Result so far: 33251.135
If we take 3240 away from 3760, we end up with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

On to step 12:
The number 648 fits into 5200 8 times, leaving a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 33251.1358
Deduct 5184 from 5200 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 13:
648 goes into 160 0 times with a remainder of 160.
Put 0 as the next digit of the answer. 
Result so far: 33251.1358
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 14:
The number 648 fits into 1600 2 times, leaving a remainder of 304.
Record the quotient 2 as the next digit in the result. 
Result so far: 33251.135802
Subtracting 1296 from 1600 leaves us with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Advancing to step 15:
When dividing 3040 by 648, we get 4 with a remainder of 448.
Write down 4 as next digit of the result. 
Result so far: 33251.1358024
Deduct 2592 from 3040 and we're left with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

On to step 16:
648 goes into 4480 6 times with a remainder of 592.
Write down 6 as next digit of the result. 
Result so far: 33251.13580246
Subtract 3888 from 4480 to get 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

The final result is 33251.13580246 with a remainder of 5.92e-07.