18099 ÷ 87 
We want to divide 18099 by 87.

Step 1:
1 divided by 87 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 87

Let's proceed to step 2:
87 can be fit into 18 0 times, resulting in a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 87

Let's proceed to step 3:
The number 87 fits into 180 2 times, leaving a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 6 after subtracting 174 from 180.
Take the next digit (9) from the dividend and append it to 6, then repeat: 69 / 87

On to step 4:
69 divided by 87 is 0 with a remainder of 69.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we take 0 away from 69, we end up with 69.
Bring next digit (9) of the dividend behind the 69 and repeat the process: 699 / 87

Step 5:
699 divided by 87 is 8 with a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 208.0
Deduct 696 from 699 and we're left 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.

Step 6:
87 goes into 30 0 times with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 208.0
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.

Moving on to step 7:
300 divided by 87 is 3 with a remainder of 39.
Record the quotient 3 as the next digit in the result. 
Result so far: 208.03
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.

Moving on to step 8:
When dividing 390 by 87, we get 4 with a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 208.034
If we take 348 away from 390, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 9:
When dividing 420 by 87, we get 4 with a remainder of 72.
The number 4 becomes the next digit in our result. 
Result so far: 208.0344
The remainder is 72 after subtracting 348 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Our division results in 208.0344 with a remaining 0.00072.