We're dividing 81690320 by 647 
The aim is to understand the frequency of 647 in 81690320.

Moving on to step 1:
8 divided by 647 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 647

Let's proceed to step 2:
647 goes into 81 0 times with a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Include the next digit (6) from the dividend after 81, then repeat: 816 / 647

On to step 3:
When dividing 816 by 647, we get 1 with a remainder of 169.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 647 from 816, we get 169.
Take the next digit (9) from the dividend and append it to 169, then repeat: 1699 / 647

Step 4:
647 goes into 1699 2 times with a remainder of 405.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we subtract 1294 from 1699, we get 405.
Grab the next digit (0) from the dividend, add it to 405, then carry on: 4050 / 647

Advancing to step 5:
647 can be fit into 4050 6 times, resulting in a remainder of 168.
The number 6 becomes the next digit in our result. 
Result so far: 126.0
If we subtract 3882 from 4050, we get 168.
Grab the next digit (3) from the dividend, add it to 168, then carry on: 1683 / 647

Moving on to step 6:
The number 647 fits into 1683 2 times, leaving a remainder of 389.
The next digit of our result is 2. 
Result so far: 1262.0
The remainder is 389 after subtracting 1294 from 1683.
Fetch the next digit (2) from the dividend, attach it to 389 and continue: 3892 / 647

Advancing to step 7:
When dividing 3892 by 647, we get 6 with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 12626.0
The remainder is 10 after subtracting 3882 from 3892.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 647

Moving on to step 8:
647 goes into 100 0 times with a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 126260.0
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 9:
If we divide 1000 by 647, we get 1 and a remainder of 353.
Record the quotient 1 as the next digit in the result. 
Result so far: 126260.1
Subtract 647 from 1000 to get 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Moving on to step 10:
647 goes into 3530 5 times with a remainder of 295.
Put 5 as the next digit of the answer. 
Result so far: 126260.15
Deduct 3235 from 3530 and we're left with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Going ahead to step 11:
647 can be fit into 2950 4 times, resulting in a remainder of 362.
The next digit of our result is 4. 
Result so far: 126260.154
Deduct 2588 from 2950 and we're left with 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Moving on to step 12:
The number 647 fits into 3620 5 times, leaving a remainder of 385.
The next digit of our result is 5. 
Result so far: 126260.1545
If we take 3235 away from 3620, we end up with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Advancing to step 13:
647 can be fit into 3850 5 times, resulting in a remainder of 615.
Put 5 as the next digit of the answer. 
Result so far: 126260.15455
The remainder is 615 after subtracting 3235 from 3850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

Our division results in 126260.15455 with a remaining 0.000615.