126486 ÷ 84 
The aim is to understand the frequency of 84 in 126486.

Moving on to step 1:
84 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 84

Step 2:
When dividing 12 by 84, we get 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Append the next digit (6) from the dividend to 12 and continue with: 126 / 84

Let's proceed to step 3:
84 can be fit into 126 1 times, resulting in a remainder of 42.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 84 from 126, we get 42.
Grab the next digit (4) from the dividend, add it to 42, then carry on: 424 / 84

On to step 4:
424 divided by 84 is 5 with a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 15.0
The remainder is 4 after subtracting 420 from 424.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 84

Going ahead to step 5:
84 can be fit into 48 0 times, resulting in a remainder of 48.
The number 0 becomes the next digit in our result. 
Result so far: 150.0
Deduct 0 from 48 and we're left with 48.
Bring next digit (6) of the dividend behind the 48 and repeat the process: 486 / 84

On to step 6:
If we divide 486 by 84, we get 5 and a remainder of 66.
The next digit of our result is 5. 
Result so far: 1505.0
Subtract 420 from 486 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 7:
84 goes into 660 7 times with a remainder of 72.
Use 7 as the next digit of our solution. 
Result so far: 1505.7
If we take 588 away from 660, we end up 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.

Moving on to step 8:
The number 84 fits into 720 8 times, leaving a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 1505.78
Subtract 672 from 720 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 9:
84 can be fit into 480 5 times, resulting in a remainder of 60.
Use 5 as the next digit of our solution. 
Result so far: 1505.785
If we subtract 420 from 480, we 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.

Let's proceed to step 10:
The number 84 fits into 600 7 times, leaving a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 1505.7857
If we subtract 588 from 600, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 11:
When dividing 120 by 84, we get 1 with a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 1505.78571
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 12:
If we divide 360 by 84, we get 4 and a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 1505.785714
If we take 336 away from 360, we end up 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.

On to step 13:
When dividing 240 by 84, we get 2 with a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 1505.7857142
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.

Moving on to step 14:
720 divided by 84 is 8 with a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 1505.78571428
The remainder is 48 after subtracting 672 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The quotient of the division is 1505.78571428, and the remainder is 4.8e-08.