We're dividing 813557 by 84 
The aim is to understand the frequency of 84 in 813557.

On to step 1:
If we divide 8 by 84, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 84

On to step 2:
81 divided by 84 is 0 with a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Bring next digit (3) of the dividend behind the 81 and repeat the process: 813 / 84

Step 3:
The number 84 fits into 813 9 times, leaving a remainder of 57.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 756 from 813, we get 57.
Grab the next digit (5) from the dividend, add it to 57, then carry on: 575 / 84

Moving on to step 4:
575 divided by 84 is 6 with a remainder of 71.
The next digit of our result is 6. 
Result so far: 96.0
If we subtract 504 from 575, we get 71.
Fetch the next digit (5) from the dividend, attach it to 71 and continue: 715 / 84

Moving on to step 5:
The number 84 fits into 715 8 times, leaving a remainder of 43.
Put 8 as the next digit of the answer. 
Result so far: 968.0
The remainder is 43 after subtracting 672 from 715.
Take the next digit (7) from the dividend and append it to 43, then repeat: 437 / 84

Step 6:
84 goes into 437 5 times with a remainder of 17.
The number 5 becomes the next digit in our result. 
Result so far: 9685.0
If we take 420 away from 437, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
84 goes into 170 2 times with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 9685.2
Deduct 168 from 170 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 8:
The number 84 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 9685.2
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
200 divided by 84 is 2 with a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 9685.202
The remainder is 32 after subtracting 168 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 10:
320 divided by 84 is 3 with a remainder of 68.
Write down 3 as next digit of the result. 
Result so far: 9685.2023
If we take 252 away from 320, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 11:
84 can be fit into 680 8 times, resulting in a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 9685.20238
Subtract 672 from 680 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 12:
When dividing 80 by 84, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 9685.20238
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 13:
When dividing 800 by 84, we get 9 with a remainder of 44.
Put 9 as the next digit of the answer. 
Result so far: 9685.2023809
If we subtract 756 from 800, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 14:
84 can be fit into 440 5 times, resulting in a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 9685.20238095
If we take 420 away from 440, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 9685.20238095 with a remainder of 2e-08.