Question

Solve A=LW or A if L=12 and W=6

Answer 1

A=12*6

72 is the answer 

Answer 2

When you have two variables next to eachother, that means to multiply.  So that's the same as

$A=L*W$

They give that $L = 12$ and $W = 6$

So now you plug $L$ and $W$ into the equation:

$A=12*6$

If you multiply $12*6$ you get $72$

So your final answer is 72!