397860 ÷ 84 
The aim is to understand the frequency of 84 in 397860.

Moving on to step 1:
When dividing 3 by 84, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 84

Step 2:
When dividing 39 by 84, we get 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Take the next digit (7) from the dividend and append it to 39, then repeat: 397 / 84

Moving on to step 3:
The number 84 fits into 397 4 times, leaving a remainder of 61.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 336 from 397 to get 61.
Fetch the next digit (8) from the dividend, attach it to 61 and continue: 618 / 84

Advancing to step 4:
When dividing 618 by 84, we get 7 with a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
If we take 588 away from 618, we end up with 30.
Include the next digit (6) from the dividend after 30, then repeat: 306 / 84

Going ahead to step 5:
84 goes into 306 3 times with a remainder of 54.
Write down 3 as next digit of the result. 
Result so far: 473.0
The remainder is 54 after subtracting 252 from 306.
Bring next digit (0) of the dividend behind the 54 and repeat the process: 540 / 84

Advancing to step 6:
When dividing 540 by 84, we get 6 with a remainder of 36.
Put 6 as the next digit of the answer. 
Result so far: 4736.0
If we take 504 away from 540, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 7:
The number 84 fits into 360 4 times, leaving a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 4736.4
Deduct 336 from 360 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 8:
84 can be fit into 240 2 times, resulting in a remainder of 72.
Use 2 as the next digit of our solution. 
Result so far: 4736.42
If we subtract 168 from 240, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 9:
When dividing 720 by 84, we get 8 with a remainder of 48.
Record the quotient 8 as the next digit in the result. 
Result so far: 4736.428
If we take 672 away from 720, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 10:
480 divided by 84 is 5 with a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 4736.4285
Subtract 420 from 480 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 11:
600 divided by 84 is 7 with a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 4736.42857
Deduct 588 from 600 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 12:
The number 84 fits into 120 1 times, leaving a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 4736.428571
If we take 84 away from 120, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 13:
When dividing 360 by 84, we get 4 with a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 4736.4285714
Deduct 336 from 360 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 14:
The number 84 fits into 240 2 times, leaving a remainder of 72.
Write down 2 as next digit of the result. 
Result so far: 4736.42857142
Subtracting 168 from 240 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Our division results in 4736.42857142 with a remaining 7.2e-08.