x x

So I understand that I convert the numbers into rational expressions and then multiple them...

x x

which simplifies to...

2 x x 3

which equals 36.

but how do I multiply these numbers without a calculator? lol... Maybe I don't even really need to know, but I'm expecting to take a placement test when I reenter university after severals years of not having to do this stuff and I'm concerned they may expect me to know how to multiply rational expressions without a calculator.

I don't know what this process or procedure is called and I can't find any clear examples in my text book.