64501745 ÷ 640 
The aim is to understand the frequency of 640 in 64501745.

Going ahead to step 1:
6 divided by 640 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 640

Going ahead to step 2:
640 goes into 64 0 times with a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Bring next digit (5) of the dividend behind the 64 and repeat the process: 645 / 640

Advancing to step 3:
If we divide 645 by 640, we get 1 and a remainder of 5.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 5 after subtracting 640 from 645.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 640

Going ahead to step 4:
50 divided by 640 is 0 with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 50, we end up with 50.
Take the next digit (1) from the dividend and append it to 50, then repeat: 501 / 640

Let's proceed to step 5:
The number 640 fits into 501 0 times, leaving a remainder of 501.
The next digit of our result is 0. 
Result so far: 100.0
Deduct 0 from 501 and we're left with 501.
Take the next digit (7) from the dividend and append it to 501, then repeat: 5017 / 640

Step 6:
640 goes into 5017 7 times with a remainder of 537.
Write down 7 as next digit of the result. 
Result so far: 1007.0
Subtract 4480 from 5017 to get 537.
Append the next digit (4) from the dividend to 537 and continue with: 5374 / 640

Let's proceed to step 7:
640 goes into 5374 8 times with a remainder of 254.
Record the quotient 8 as the next digit in the result. 
Result so far: 10078.0
If we subtract 5120 from 5374, we get 254.
Include the next digit (5) from the dividend after 254, then repeat: 2545 / 640

Step 8:
2545 divided by 640 is 3 with a remainder of 625.
Record the quotient 3 as the next digit in the result. 
Result so far: 100783.0
If we take 1920 away from 2545, we end up with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Step 9:
If we divide 6250 by 640, we get 9 and a remainder of 490.
Write down 9 as next digit of the result. 
Result so far: 100783.9
Subtract 5760 from 6250 to get 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Moving on to step 10:
The number 640 fits into 4900 7 times, leaving a remainder of 420.
The number 7 becomes the next digit in our result. 
Result so far: 100783.97
Subtract 4480 from 4900 to get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

On to step 11:
640 can be fit into 4200 6 times, resulting in a remainder of 360.
The next digit of our result is 6. 
Result so far: 100783.976
Subtracting 3840 from 4200 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Step 12:
When dividing 3600 by 640, we get 5 with a remainder of 400.
Use 5 as the next digit of our solution. 
Result so far: 100783.9765
The remainder is 400 after subtracting 3200 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Moving on to step 13:
640 can be fit into 4000 6 times, resulting in a remainder of 160.
Put 6 as the next digit of the answer. 
Result so far: 100783.97656
The remainder is 160 after subtracting 3840 from 4000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 14:
640 goes into 1600 2 times with a remainder of 320.
Record the quotient 2 as the next digit in the result. 
Result so far: 100783.976562
Deduct 1280 from 1600 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 15:
640 goes into 3200 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 100783.9765625
If we subtract 3200 from 3200, 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.

Moving on to step 16:
When dividing 0 by 640, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 100783.9765625
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.

The quotient of the division is 100783.9765625, and the remainder is 0.0.