520671 divided by 87 
The aim is to understand the frequency of 87 in 520671.

Let's proceed to step 1:
87 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 87

Step 2:
When dividing 52 by 87, we get 0 with a remainder of 52.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Include the next digit (0) from the dividend after 52, then repeat: 520 / 87

Going ahead to step 3:
87 can be fit into 520 5 times, resulting in a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Deduct 435 from 520 and we're left with 85.
Bring next digit (6) of the dividend behind the 85 and repeat the process: 856 / 87

Let's proceed to step 4:
87 goes into 856 9 times with a remainder of 73.
Use 9 as the next digit of our solution. 
Result so far: 59.0
Subtract 783 from 856 to get 73.
Take the next digit (7) from the dividend and append it to 73, then repeat: 737 / 87

Going ahead to step 5:
737 divided by 87 is 8 with a remainder of 41.
The number 8 becomes the next digit in our result. 
Result so far: 598.0
If we take 696 away from 737, we end up with 41.
Grab the next digit (1) from the dividend, add it to 41, then carry on: 411 / 87

Let's proceed to step 6:
When dividing 411 by 87, we get 4 with a remainder of 63.
The next digit of our result is 4. 
Result so far: 5984.0
Deduct 348 from 411 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 7:
630 divided by 87 is 7 with a remainder of 21.
Use 7 as the next digit of our solution. 
Result so far: 5984.7
The remainder is 21 after subtracting 609 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 8:
If we divide 210 by 87, we get 2 and a remainder of 36.
The next digit of our result is 2. 
Result so far: 5984.72
Subtracting 174 from 210 leaves us 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.

On to step 9:
360 divided by 87 is 4 with a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 5984.724
Deduct 348 from 360 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.

On to step 10:
87 goes into 120 1 times with a remainder of 33.
Write down 1 as next digit of the result. 
Result so far: 5984.7241
If we take 87 away from 120, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 11:
If we divide 330 by 87, we get 3 and a remainder of 69.
The next digit of our result is 3. 
Result so far: 5984.72413
Subtract 261 from 330 to get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 12:
The number 87 fits into 690 7 times, leaving a remainder of 81.
The number 7 becomes the next digit in our result. 
Result so far: 5984.724137
Subtract 609 from 690 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 13:
87 can be fit into 810 9 times, resulting in a remainder of 27.
Use 9 as the next digit of our solution. 
Result so far: 5984.7241379
If we subtract 783 from 810, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 14:
The number 87 fits into 270 3 times, leaving a remainder of 9.
Record the quotient 3 as the next digit in the result. 
Result so far: 5984.72413793
Subtracting 261 from 270 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Our division results in 5984.72413793 with a remaining 9e-09.