We look at the division of 30187 by 12 
Let's see how many times 12 fits into 30187.

Let's proceed to step 1:
If we divide 3 by 12, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 12

Moving on to step 2:
When dividing 30 by 12, we get 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 24 from 30, we get 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 12

Let's proceed to step 3:
If we divide 61 by 12, we get 5 and a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 25.0
If we take 60 away from 61, we end up with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 12

Going ahead to step 4:
12 goes into 18 1 times with a remainder of 6.
The next digit of our result is 1. 
Result so far: 251.0
Deduct 12 from 18 and we're left with 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 12

Moving on to step 5:
The number 12 fits into 67 5 times, leaving a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 2515.0
The remainder is 7 after subtracting 60 from 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 6:
70 divided by 12 is 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 2515.5
If we subtract 60 from 70, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 7:
12 goes into 100 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 2515.58
The remainder is 4 after subtracting 96 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 8:
40 divided by 12 is 3 with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 2515.583
If we subtract 36 from 40, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
40 divided by 12 is 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 2515.5833
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 2515.5833, with a leftover of 4e-05.