681870 divided by 87 
The aim is to understand the frequency of 87 in 681870.

On to step 1:
87 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 87

Step 2:
If we divide 68 by 87, we get 0 and a remainder of 68.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 68 after subtracting 0 from 68.
Take the next digit (1) from the dividend and append it to 68, then repeat: 681 / 87

Moving on to step 3:
87 can be fit into 681 7 times, resulting in a remainder of 72.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 72 after subtracting 609 from 681.
Grab the next digit (8) from the dividend, add it to 72, then carry on: 728 / 87

Step 4:
728 divided by 87 is 8 with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 78.0
If we subtract 696 from 728, we get 32.
Fetch the next digit (7) from the dividend, attach it to 32 and continue: 327 / 87

Going ahead to step 5:
327 divided by 87 is 3 with a remainder of 66.
Write down 3 as next digit of the result. 
Result so far: 783.0
The remainder is 66 after subtracting 261 from 327.
Take the next digit (0) from the dividend and append it to 66, then repeat: 660 / 87

On to step 6:
When dividing 660 by 87, we get 7 with a remainder of 51.
Use 7 as the next digit of our solution. 
Result so far: 7837.0
The remainder is 51 after subtracting 609 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 7:
87 goes into 510 5 times with a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 7837.5
If we take 435 away from 510, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 8:
750 divided by 87 is 8 with a remainder of 54.
Record the quotient 8 as the next digit in the result. 
Result so far: 7837.58
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:
87 can be fit into 540 6 times, resulting in a remainder of 18.
Record the quotient 6 as the next digit in the result. 
Result so far: 7837.586
The remainder is 18 after subtracting 522 from 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 10:
87 can be fit into 180 2 times, resulting in a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 7837.5862
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.

Step 11:
If we divide 60 by 87, we get 0 and a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 7837.5862
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 12:
When dividing 600 by 87, we get 6 with a remainder of 78.
Use 6 as the next digit of our solution. 
Result so far: 7837.586206
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.

Let's proceed to step 13:
If we divide 780 by 87, we get 8 and a remainder of 84.
Write down 8 as next digit of the result. 
Result so far: 7837.5862068
Subtract 696 from 780 to 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:
87 goes into 840 9 times with a remainder of 57.
Record the quotient 9 as the next digit in the result. 
Result so far: 7837.58620689
Subtracting 783 from 840 leaves us with 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 7837.58620689 and a remainder of 5.7e-08.