641536 ÷ 64 
The aim is to understand the frequency of 64 in 641536.

Going ahead to step 1:
6 divided by 64 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 64

Step 2:
64 goes into 64 1 times with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 64 from 64 and we're left with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 64

On to step 3:
If we divide 1 by 64, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 1 to get 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 64

Moving on to step 4:
15 divided by 64 is 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 100.0
If we take 0 away from 15, we end up with 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 64

Moving on to step 5:
When dividing 153 by 64, we get 2 with a remainder of 25.
Put 2 as the next digit of the answer. 
Result so far: 1002.0
Subtract 128 from 153 to get 25.
Grab the next digit (6) from the dividend, add it to 25, then carry on: 256 / 64

Moving on to step 6:
When dividing 256 by 64, we get 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 10024.0
Subtract 256 from 256 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
0 divided by 64 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10024.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
When dividing 0 by 64, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 10024.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 10024.0 with a remainder of 0.0.