154863 divided by 87 
The aim is to understand the frequency of 87 in 154863.

Step 1:
If we divide 1 by 87, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 87

Going ahead to step 2:
The number 87 fits into 15 0 times, leaving a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Include the next digit (4) from the dividend after 15, then repeat: 154 / 87

Going ahead to step 3:
When dividing 154 by 87, we get 1 with a remainder of 67.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 87 from 154 and we're left with 67.
Include the next digit (8) from the dividend after 67, then repeat: 678 / 87

On to step 4:
678 divided by 87 is 7 with a remainder of 69.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtract 609 from 678 to get 69.
Bring next digit (6) of the dividend behind the 69 and repeat the process: 696 / 87

Going ahead to step 5:
The number 87 fits into 696 8 times, leaving a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 178.0
The remainder is 0 after subtracting 696 from 696.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 87

Advancing to step 6:
If we divide 3 by 87, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 1780.0
If we take 0 away from 3, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
The number 87 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 1780.0
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
If we divide 300 by 87, we get 3 and a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 1780.03
The remainder is 39 after subtracting 261 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 9:
390 divided by 87 is 4 with a remainder of 42.
Record the quotient 4 as the next digit in the result. 
Result so far: 1780.034
If we subtract 348 from 390, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 10:
87 can be fit into 420 4 times, resulting in a remainder of 72.
Record the quotient 4 as the next digit in the result. 
Result so far: 1780.0344
If we take 348 away from 420, 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.

After the division, we end up with 1780.0344 and a remainder of 0.00072.