12 x 2 / 6 x 15.......use PEMDAS, make sure when you are doing multiplication/division you do it left to right in the expression and the same thing for addition/subtraction.
12 x 2 / 6 x 15.....multiply 12 x 2
24 / 6 x 15.......divide 24 by 6
4 x 15....multiply
60.......answer