We divide 647720 by 77
The aim is to understand the frequency of 77 in 647720.

Going ahead to step 1:
If we divide 6 by 77, we get 0 and 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 / 77

Moving on to step 2:
64 divided by 77 is 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Append the next digit (7) from the dividend to 64 and continue with: 647 / 77

On to step 3:
77 can be fit into 647 8 times, resulting in a remainder of 31.
The next digit of our result is 8. 
Result so far: 8.0
If we take 616 away from 647, we end up with 31.
Fetch the next digit (7) from the dividend, attach it to 31 and continue: 317 / 77

Advancing to step 4:
The number 77 fits into 317 4 times, leaving a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 84.0
Subtracting 308 from 317 leaves us with 9.
Bring next digit (2) of the dividend behind the 9 and repeat the process: 92 / 77

On to step 5:
92 divided by 77 is 1 with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 841.0
Subtract 77 from 92 to get 15.
Bring next digit (0) of the dividend behind the 15 and repeat the process: 150 / 77

Step 6:
When dividing 150 by 77, we get 1 with a remainder of 73.
The number 1 becomes the next digit in our result. 
Result so far: 8411.0
If we take 77 away from 150, we end up with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 7:
730 divided by 77 is 9 with a remainder of 37.
Put 9 as the next digit of the answer. 
Result so far: 8411.9
Subtracting 693 from 730 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 8:
370 divided by 77 is 4 with a remainder of 62.
Use 4 as the next digit of our solution. 
Result so far: 8411.94
If we take 308 away from 370, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 9:
If we divide 620 by 77, we get 8 and a remainder of 4.
The next digit of our result is 8. 
Result so far: 8411.948
Subtract 616 from 620 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
40 divided by 77 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 8411.948
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 11:
77 can be fit into 400 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 8411.94805
Subtract 385 from 400 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 12:
If we divide 150 by 77, we get 1 and a remainder of 73.
Record the quotient 1 as the next digit in the result. 
Result so far: 8411.948051
If we take 77 away from 150, we end up with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 13:
When dividing 730 by 77, we get 9 with a remainder of 37.
Use 9 as the next digit of our solution. 
Result so far: 8411.9480519
If we take 693 away from 730, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 14:
370 divided by 77 is 4 with a remainder of 62.
The next digit of our result is 4. 
Result so far: 8411.94805194
Subtract 308 from 370 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Our division results in 8411.94805194 with a remaining 6.2e-08.