We're dividing 87603 by 18 
We're looking to find how many times 18 goes into 87603.

Going ahead to step 1:
18 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 18

Step 2:
18 goes into 87 4 times with a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 72 from 87 leaves us with 15.
Include the next digit (6) from the dividend after 15, then repeat: 156 / 18

Let's proceed to step 3:
156 divided by 18 is 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
The remainder is 12 after subtracting 144 from 156.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 18

Going ahead to step 4:
When dividing 120 by 18, we get 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 486.0
Subtract 108 from 120 to get 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 18

Let's proceed to step 5:
The number 18 fits into 123 6 times, leaving a remainder of 15.
Write down 6 as next digit of the result. 
Result so far: 4866.0
The remainder is 15 after subtracting 108 from 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 6:
When dividing 150 by 18, we get 8 with a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 4866.8
If we take 144 away from 150, 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 7:
60 divided by 18 is 3 with a remainder of 6.
The next digit of our result is 3. 
Result so far: 4866.83
Subtracting 54 from 60 leaves us 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.

On to step 8:
The number 18 fits into 60 3 times, leaving a remainder of 6.
The next digit of our result is 3. 
Result so far: 4866.833
Deduct 54 from 60 and we're left 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.

The final outcome is 4866.833, with a leftover of 0.0006.