578530 divided by 84 
The aim is to understand the frequency of 84 in 578530.

Moving on to step 1:
When dividing 5 by 84, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 84

On to step 2:
When dividing 57 by 84, we get 0 with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 57 leaves us with 57.
Take the next digit (8) from the dividend and append it to 57, then repeat: 578 / 84

Moving on to step 3:
84 goes into 578 6 times with a remainder of 74.
The next digit of our result is 6. 
Result so far: 6.0
If we subtract 504 from 578, we get 74.
Fetch the next digit (5) from the dividend, attach it to 74 and continue: 745 / 84

Going ahead to step 4:
When dividing 745 by 84, we get 8 with a remainder of 73.
Put 8 as the next digit of the answer. 
Result so far: 68.0
Subtract 672 from 745 to get 73.
Include the next digit (3) from the dividend after 73, then repeat: 733 / 84

Step 5:
The number 84 fits into 733 8 times, leaving a remainder of 61.
The number 8 becomes the next digit in our result. 
Result so far: 688.0
The remainder is 61 after subtracting 672 from 733.
Grab the next digit (0) from the dividend, add it to 61, then carry on: 610 / 84

Step 6:
84 can be fit into 610 7 times, resulting in a remainder of 22.
Use 7 as the next digit of our solution. 
Result so far: 6887.0
If we subtract 588 from 610, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
84 can be fit into 220 2 times, resulting in a remainder of 52.
Record the quotient 2 as the next digit in the result. 
Result so far: 6887.2
Subtracting 168 from 220 leaves us 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.

On to step 8:
520 divided by 84 is 6 with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 6887.26
If we take 504 away from 520, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
When dividing 160 by 84, we get 1 with a remainder of 76.
Record the quotient 1 as the next digit in the result. 
Result so far: 6887.261
Deduct 84 from 160 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 10:
If we divide 760 by 84, we get 9 and a remainder of 4.
Put 9 as the next digit of the answer. 
Result so far: 6887.2619
Subtract 756 from 760 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 11:
84 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 6887.2619
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 12:
84 goes into 400 4 times with a remainder of 64.
Record the quotient 4 as the next digit in the result. 
Result so far: 6887.261904
The remainder is 64 after subtracting 336 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 13:
When dividing 640 by 84, we get 7 with a remainder of 52.
Record the quotient 7 as the next digit in the result. 
Result so far: 6887.2619047
The remainder is 52 after subtracting 588 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 14:
520 divided by 84 is 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 6887.26190476
Deduct 504 from 520 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 6887.26190476 with a remaining 1.6e-08.