64850273 ÷ 640 
The aim is to understand the frequency of 640 in 64850273.

Moving on to step 1:
6 divided by 640 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 640

Let's proceed to step 2:
64 divided by 640 is 0 with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Take the next digit (8) from the dividend and append it to 64, then repeat: 648 / 640

Going ahead to step 3:
640 goes into 648 1 times with a remainder of 8.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 640 from 648, we get 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 640

Moving on to step 4:
The number 640 fits into 85 0 times, leaving a remainder of 85.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 85 leaves us with 85.
Append the next digit (0) from the dividend to 85 and continue with: 850 / 640

Moving on to step 5:
640 goes into 850 1 times with a remainder of 210.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
The remainder is 210 after subtracting 640 from 850.
Include the next digit (2) from the dividend after 210, then repeat: 2102 / 640

Let's proceed to step 6:
When dividing 2102 by 640, we get 3 with a remainder of 182.
The number 3 becomes the next digit in our result. 
Result so far: 1013.0
Deduct 1920 from 2102 and we're left with 182.
Include the next digit (7) from the dividend after 182, then repeat: 1827 / 640

Moving on to step 7:
If we divide 1827 by 640, we get 2 and a remainder of 547.
Write down 2 as next digit of the result. 
Result so far: 10132.0
If we take 1280 away from 1827, we end up with 547.
Grab the next digit (3) from the dividend, add it to 547, then carry on: 5473 / 640

Moving on to step 8:
640 can be fit into 5473 8 times, resulting in a remainder of 353.
Record the quotient 8 as the next digit in the result. 
Result so far: 101328.0
If we take 5120 away from 5473, we end up with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Moving on to step 9:
3530 divided by 640 is 5 with a remainder of 330.
Put 5 as the next digit of the answer. 
Result so far: 101328.5
If we take 3200 away from 3530, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Step 10:
3300 divided by 640 is 5 with a remainder of 100.
The number 5 becomes the next digit in our result. 
Result so far: 101328.55
If we take 3200 away from 3300, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Our division results in 101328.55 with a remaining 0.1.