423480 ÷ 87 
The aim is to understand the frequency of 87 in 423480.

Let's proceed to step 1:
87 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 87

Advancing to step 2:
87 goes into 42 0 times with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 87

On to step 3:
When dividing 423 by 87, we get 4 with a remainder of 75.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 348 from 423 to get 75.
Include the next digit (4) from the dividend after 75, then repeat: 754 / 87

Advancing to step 4:
The number 87 fits into 754 8 times, leaving a remainder of 58.
The next digit of our result is 8. 
Result so far: 48.0
If we subtract 696 from 754, we get 58.
Grab the next digit (8) from the dividend, add it to 58, then carry on: 588 / 87

On to step 5:
The number 87 fits into 588 6 times, leaving a remainder of 66.
Write down 6 as next digit of the result. 
Result so far: 486.0
If we subtract 522 from 588, we get 66.
Append the next digit (0) from the dividend to 66 and continue with: 660 / 87

Let's proceed to step 6:
When dividing 660 by 87, we get 7 with a remainder of 51.
Record the quotient 7 as the next digit in the result. 
Result so far: 4867.0
If we take 609 away from 660, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 7:
The number 87 fits into 510 5 times, leaving a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 4867.5
If we subtract 435 from 510, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 8:
If we divide 750 by 87, we get 8 and a remainder of 54.
Record the quotient 8 as the next digit in the result. 
Result so far: 4867.58
Subtracting 696 from 750 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 9:
When dividing 540 by 87, we get 6 with a remainder of 18.
Use 6 as the next digit of our solution. 
Result so far: 4867.586
Subtracting 522 from 540 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 10:
87 can be fit into 180 2 times, resulting in a remainder of 6.
The next digit of our result is 2. 
Result so far: 4867.5862
If we take 174 away from 180, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 11:
When dividing 60 by 87, we get 0 with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 4867.5862
Subtract 0 from 60 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.

Let's proceed to step 12:
87 can be fit into 600 6 times, resulting in a remainder of 78.
Use 6 as the next digit of our solution. 
Result so far: 4867.586206
Deduct 522 from 600 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 13:
87 can be fit into 780 8 times, resulting in a remainder of 84.
Write down 8 as next digit of the result. 
Result so far: 4867.5862068
If we subtract 696 from 780, we get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Going ahead to step 14:
If we divide 840 by 87, we get 9 and a remainder of 57.
Use 9 as the next digit of our solution. 
Result so far: 4867.58620689
If we subtract 783 from 840, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

After the division, we end up with 4867.58620689 and a remainder of 5.7e-08.