You don't divide 48 by 2 first and then multiply by 12. It's 48 divided by 2(9+3). My point is that to get a calculator to treat it as such, you need to use parentheses to say 48/(2(9+3)). In reality, if you wrote it out instead of using a calculator, I'm fairly certain that you would solve the denominator first by multiplying 2x12, then divide that into 48. I don't think you'd write it out and then divide 48 by 2 and multiply the answer by 12.

man just because you have a backslash DOES NOT MEAN IT"S A FUCKING FRACTION

it's just a division sign.

it's not like shit is grouped on either side like in a fraction. it's left to right. FUCK