Let's divide 64660566 by 780
The aim is to understand the frequency of 780 in 64660566.

On to step 1:
780 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 780

Step 2:
If we divide 64 by 780, we get 0 and a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Take the next digit (6) from the dividend and append it to 64, then repeat: 646 / 780

Moving on to step 3:
780 goes into 646 0 times with a remainder of 646.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 646 after subtracting 0 from 646.
Include the next digit (6) from the dividend after 646, then repeat: 6466 / 780

Let's proceed to step 4:
The number 780 fits into 6466 8 times, leaving a remainder of 226.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 6240 from 6466 to get 226.
Append the next digit (0) from the dividend to 226 and continue with: 2260 / 780

Going ahead to step 5:
When dividing 2260 by 780, we get 2 with a remainder of 700.
Use 2 as the next digit of our solution. 
Result so far: 82.0
If we subtract 1560 from 2260, we get 700.
Include the next digit (5) from the dividend after 700, then repeat: 7005 / 780

On to step 6:
The number 780 fits into 7005 8 times, leaving a remainder of 765.
The next digit of our result is 8. 
Result so far: 828.0
If we take 6240 away from 7005, we end up with 765.
Fetch the next digit (6) from the dividend, attach it to 765 and continue: 7656 / 780

Going ahead to step 7:
When dividing 7656 by 780, we get 9 with a remainder of 636.
The number 9 becomes the next digit in our result. 
Result so far: 8289.0
If we take 7020 away from 7656, we end up with 636.
Append the next digit (6) from the dividend to 636 and continue with: 6366 / 780

Moving on to step 8:
When dividing 6366 by 780, we get 8 with a remainder of 126.
Record the quotient 8 as the next digit in the result. 
Result so far: 82898.0
The remainder is 126 after subtracting 6240 from 6366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

On to step 9:
When dividing 1260 by 780, we get 1 with a remainder of 480.
Put 1 as the next digit of the answer. 
Result so far: 82898.1
Subtract 780 from 1260 to 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 10:
If we divide 4800 by 780, we get 6 and a remainder of 120.
Use 6 as the next digit of our solution. 
Result so far: 82898.16
The remainder is 120 after subtracting 4680 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 11:
1200 divided by 780 is 1 with a remainder of 420.
Put 1 as the next digit of the answer. 
Result so far: 82898.161
If we subtract 780 from 1200, we 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.

Step 12:
When dividing 4200 by 780, we get 5 with a remainder of 300.
The next digit of our result is 5. 
Result so far: 82898.1615
If we subtract 3900 from 4200, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 13:
If we divide 3000 by 780, we get 3 and a remainder of 660.
Write down 3 as next digit of the result. 
Result so far: 82898.16153
If we take 2340 away from 3000, we end up with 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Advancing to step 14:
780 can be fit into 6600 8 times, resulting in a remainder of 360.
The number 8 becomes the next digit in our result. 
Result so far: 82898.161538
If we subtract 6240 from 6600, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 15:
The number 780 fits into 3600 4 times, leaving a remainder of 480.
Write down 4 as next digit of the result. 
Result so far: 82898.1615384
Deduct 3120 from 3600 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 16:
4800 divided by 780 is 6 with a remainder of 120.
The number 6 becomes the next digit in our result. 
Result so far: 82898.16153846
Subtract 4680 from 4800 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

After the division, we end up with 82898.16153846 and a remainder of 1.2e-07.