We're dividing 7804019 by 649 
The aim is to understand the frequency of 649 in 7804019.

Advancing to step 1:
When dividing 7 by 649, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 649

Advancing to step 2:
The number 649 fits into 78 0 times, leaving a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Fetch the next digit (0) from the dividend, attach it to 78 and continue: 780 / 649

On to step 3:
780 divided by 649 is 1 with a remainder of 131.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 649 from 780 leaves us with 131.
Grab the next digit (4) from the dividend, add it to 131, then carry on: 1314 / 649

Step 4:
When dividing 1314 by 649, we get 2 with a remainder of 16.
The next digit of our result is 2. 
Result so far: 12.0
If we subtract 1298 from 1314, we get 16.
Include the next digit (0) from the dividend after 16, then repeat: 160 / 649

Let's proceed to step 5:
If we divide 160 by 649, we get 0 and a remainder of 160.
Record the quotient 0 as the next digit in the result. 
Result so far: 120.0
Subtract 0 from 160 to get 160.
Bring next digit (1) of the dividend behind the 160 and repeat the process: 1601 / 649

Going ahead to step 6:
The number 649 fits into 1601 2 times, leaving a remainder of 303.
The number 2 becomes the next digit in our result. 
Result so far: 1202.0
Subtracting 1298 from 1601 leaves us with 303.
Bring next digit (9) of the dividend behind the 303 and repeat the process: 3039 / 649

Let's proceed to step 7:
The number 649 fits into 3039 4 times, leaving a remainder of 443.
Write down 4 as next digit of the result. 
Result so far: 12024.0
Subtracting 2596 from 3039 leaves us with 443.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4430, and continue the process.

Advancing to step 8:
649 can be fit into 4430 6 times, resulting in a remainder of 536.
The number 6 becomes the next digit in our result. 
Result so far: 12024.6
Deduct 3894 from 4430 and we're left 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.

Advancing to step 9:
When dividing 5360 by 649, we get 8 with a remainder of 168.
The number 8 becomes the next digit in our result. 
Result so far: 12024.68
If we take 5192 away from 5360, we end up with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

On to step 10:
649 can be fit into 1680 2 times, resulting in a remainder of 382.
Put 2 as the next digit of the answer. 
Result so far: 12024.682
Subtract 1298 from 1680 to get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

On to step 11:
The number 649 fits into 3820 5 times, leaving a remainder of 575.
Put 5 as the next digit of the answer. 
Result so far: 12024.6825
Deduct 3245 from 3820 and we're left with 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Let's proceed to step 12:
The number 649 fits into 5750 8 times, leaving a remainder of 558.
Record the quotient 8 as the next digit in the result. 
Result so far: 12024.68258
The remainder is 558 after subtracting 5192 from 5750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5580, and continue the process.

On to step 13:
When dividing 5580 by 649, we get 8 with a remainder of 388.
Write down 8 as next digit of the result. 
Result so far: 12024.682588
If we take 5192 away from 5580, we end up with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

The final result is 12024.682588 with a remainder of 3.88e-05.