We're dividing 77897686 by 828 
The aim is to understand the frequency of 828 in 77897686.

Let's proceed to step 1:
When dividing 7 by 828, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 828

Going ahead to step 2:
77 divided by 828 is 0 with a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Fetch the next digit (8) from the dividend, attach it to 77 and continue: 778 / 828

Let's proceed to step 3:
778 divided by 828 is 0 with a remainder of 778.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 778, we get 778.
Include the next digit (9) from the dividend after 778, then repeat: 7789 / 828

On to step 4:
If we divide 7789 by 828, we get 9 and a remainder of 337.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtracting 7452 from 7789 leaves us with 337.
Include the next digit (7) from the dividend after 337, then repeat: 3377 / 828

Advancing to step 5:
If we divide 3377 by 828, we get 4 and a remainder of 65.
The next digit of our result is 4. 
Result so far: 94.0
If we take 3312 away from 3377, we end up with 65.
Grab the next digit (6) from the dividend, add it to 65, then carry on: 656 / 828

Step 6:
656 divided by 828 is 0 with a remainder of 656.
Record the quotient 0 as the next digit in the result. 
Result so far: 940.0
Subtract 0 from 656 to get 656.
Include the next digit (8) from the dividend after 656, then repeat: 6568 / 828

On to step 7:
If we divide 6568 by 828, we get 7 and a remainder of 772.
The number 7 becomes the next digit in our result. 
Result so far: 9407.0
The remainder is 772 after subtracting 5796 from 6568.
Grab the next digit (6) from the dividend, add it to 772, then carry on: 7726 / 828

Step 8:
The number 828 fits into 7726 9 times, leaving a remainder of 274.
Use 9 as the next digit of our solution. 
Result so far: 94079.0
If we subtract 7452 from 7726, we get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Step 9:
2740 divided by 828 is 3 with a remainder of 256.
Record the quotient 3 as the next digit in the result. 
Result so far: 94079.3
Deduct 2484 from 2740 and we're left with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

On to step 10:
2560 divided by 828 is 3 with a remainder of 76.
The next digit of our result is 3. 
Result so far: 94079.33
Subtract 2484 from 2560 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final result is 94079.33 with a remainder of 0.076.