780687 divided by 87 
The aim is to understand the frequency of 87 in 780687.

Moving on to step 1:
7 divided by 87 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 87

Going ahead to step 2:
78 divided by 87 is 0 with a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Take the next digit (0) from the dividend and append it to 78, then repeat: 780 / 87

On to step 3:
780 divided by 87 is 8 with a remainder of 84.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 696 from 780, we get 84.
Fetch the next digit (6) from the dividend, attach it to 84 and continue: 846 / 87

Step 4:
846 divided by 87 is 9 with a remainder of 63.
The number 9 becomes the next digit in our result. 
Result so far: 89.0
Subtracting 783 from 846 leaves us with 63.
Bring next digit (8) of the dividend behind the 63 and repeat the process: 638 / 87

Let's proceed to step 5:
The number 87 fits into 638 7 times, leaving a remainder of 29.
Record the quotient 7 as the next digit in the result. 
Result so far: 897.0
The remainder is 29 after subtracting 609 from 638.
Take the next digit (7) from the dividend and append it to 29, then repeat: 297 / 87

Moving on to step 6:
297 divided by 87 is 3 with a remainder of 36.
Write down 3 as next digit of the result. 
Result so far: 8973.0
Deduct 261 from 297 and we're left 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:
360 divided by 87 is 4 with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 8973.4
Subtracting 348 from 360 leaves us 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.

Advancing to step 8:
When dividing 120 by 87, we get 1 with a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 8973.41
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.

On to step 9:
When dividing 330 by 87, we get 3 with a remainder of 69.
The next digit of our result is 3. 
Result so far: 8973.413
The remainder is 69 after subtracting 261 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 10:
The number 87 fits into 690 7 times, leaving a remainder of 81.
The next digit of our result is 7. 
Result so far: 8973.4137
If we subtract 609 from 690, we 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.

Let's proceed to step 11:
87 goes into 810 9 times with a remainder of 27.
The number 9 becomes the next digit in our result. 
Result so far: 8973.41379
Subtracting 783 from 810 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 12:
87 goes into 270 3 times with a remainder of 9.
The next digit of our result is 3. 
Result so far: 8973.413793
Deduct 261 from 270 and we're left 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.

Advancing to step 13:
The number 87 fits into 90 1 times, leaving a remainder of 3.
The next digit of our result is 1. 
Result so far: 8973.4137931
If we subtract 87 from 90, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 14:
87 goes into 30 0 times with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 8973.4137931
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final outcome is 8973.4137931, with a leftover of 3e-08.