7816209 divided by 307 
The aim is to understand the frequency of 307 in 7816209.

Going ahead to step 1:
307 goes into 7 0 times with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 307

On to step 2:
307 can be fit into 78 0 times, resulting in a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Take the next digit (1) from the dividend and append it to 78, then repeat: 781 / 307

Advancing to step 3:
When dividing 781 by 307, we get 2 with a remainder of 167.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 614 from 781 leaves us with 167.
Bring next digit (6) of the dividend behind the 167 and repeat the process: 1676 / 307

Advancing to step 4:
307 goes into 1676 5 times with a remainder of 141.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
If we subtract 1535 from 1676, we get 141.
Include the next digit (2) from the dividend after 141, then repeat: 1412 / 307

Advancing to step 5:
If we divide 1412 by 307, we get 4 and a remainder of 184.
The number 4 becomes the next digit in our result. 
Result so far: 254.0
Deduct 1228 from 1412 and we're left with 184.
Bring next digit (0) of the dividend behind the 184 and repeat the process: 1840 / 307

Advancing to step 6:
307 goes into 1840 5 times with a remainder of 305.
Write down 5 as next digit of the result. 
Result so far: 2545.0
Deduct 1535 from 1840 and we're left with 305.
Include the next digit (9) from the dividend after 305, then repeat: 3059 / 307

Advancing to step 7:
307 goes into 3059 9 times with a remainder of 296.
Record the quotient 9 as the next digit in the result. 
Result so far: 25459.0
The remainder is 296 after subtracting 2763 from 3059.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Going ahead to step 8:
307 goes into 2960 9 times with a remainder of 197.
Use 9 as the next digit of our solution. 
Result so far: 25459.9
If we take 2763 away from 2960, we end up with 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

On to step 9:
1970 divided by 307 is 6 with a remainder of 128.
Put 6 as the next digit of the answer. 
Result so far: 25459.96
If we subtract 1842 from 1970, we get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 10:
When dividing 1280 by 307, we get 4 with a remainder of 52.
The number 4 becomes the next digit in our result. 
Result so far: 25459.964
If we take 1228 away from 1280, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 11:
If we divide 520 by 307, we get 1 and a remainder of 213.
Put 1 as the next digit of the answer. 
Result so far: 25459.9641
If we subtract 307 from 520, we get 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Going ahead to step 12:
2130 divided by 307 is 6 with a remainder of 288.
The next digit of our result is 6. 
Result so far: 25459.96416
If we subtract 1842 from 2130, we get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Let's proceed to step 13:
2880 divided by 307 is 9 with a remainder of 117.
Put 9 as the next digit of the answer. 
Result so far: 25459.964169
Subtracting 2763 from 2880 leaves us with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

On to step 14:
The number 307 fits into 1170 3 times, leaving a remainder of 249.
Put 3 as the next digit of the answer. 
Result so far: 25459.9641693
Subtract 921 from 1170 to get 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Moving on to step 15:
The number 307 fits into 2490 8 times, leaving a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 25459.96416938
If we subtract 2456 from 2490, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

In conclusion, the division gives 25459.96416938 with a balance of 3.4e-08.