Let's divide 78842776 by 640
The aim is to understand the frequency of 640 in 78842776.

Step 1:
When dividing 7 by 640, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 640

Let's proceed to step 2:
640 can be fit into 78 0 times, resulting in a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Fetch the next digit (8) from the dividend, attach it to 78 and continue: 788 / 640

Moving on to step 3:
640 can be fit into 788 1 times, resulting in a remainder of 148.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 640 from 788 and we're left with 148.
Include the next digit (4) from the dividend after 148, then repeat: 1484 / 640

Step 4:
640 can be fit into 1484 2 times, resulting in a remainder of 204.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 1280 from 1484 leaves us with 204.
Include the next digit (2) from the dividend after 204, then repeat: 2042 / 640

Step 5:
If we divide 2042 by 640, we get 3 and a remainder of 122.
Put 3 as the next digit of the answer. 
Result so far: 123.0
If we subtract 1920 from 2042, we get 122.
Bring next digit (7) of the dividend behind the 122 and repeat the process: 1227 / 640

Advancing to step 6:
1227 divided by 640 is 1 with a remainder of 587.
Record the quotient 1 as the next digit in the result. 
Result so far: 1231.0
If we subtract 640 from 1227, we get 587.
Fetch the next digit (7) from the dividend, attach it to 587 and continue: 5877 / 640

Advancing to step 7:
When dividing 5877 by 640, we get 9 with a remainder of 117.
Use 9 as the next digit of our solution. 
Result so far: 12319.0
Deduct 5760 from 5877 and we're left with 117.
Take the next digit (6) from the dividend and append it to 117, then repeat: 1176 / 640

Step 8:
When dividing 1176 by 640, we get 1 with a remainder of 536.
Put 1 as the next digit of the answer. 
Result so far: 123191.0
Subtracting 640 from 1176 leaves us with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Let's proceed to step 9:
640 can be fit into 5360 8 times, resulting in a remainder of 240.
Record the quotient 8 as the next digit in the result. 
Result so far: 123191.8
Subtract 5120 from 5360 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 10:
If we divide 2400 by 640, we get 3 and a remainder of 480.
The number 3 becomes the next digit in our result. 
Result so far: 123191.83
If we subtract 1920 from 2400, we get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 11:
The number 640 fits into 4800 7 times, leaving a remainder of 320.
Use 7 as the next digit of our solution. 
Result so far: 123191.837
If we subtract 4480 from 4800, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 12:
3200 divided by 640 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 123191.8375
Subtracting 3200 from 3200 leaves us 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.

Step 13:
0 divided by 640 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 123191.8375
The remainder is 0 after subtracting 0 from 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 14:
The number 640 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 123191.8375
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 quotient of the division is 123191.8375, and the remainder is 0.0.