Algebra

3x(x+2y)

if x = 2/3 and y = 1/6

3(2/3) [ (2/3) + 2(1/6) ]  =

2 [ 2/3 + 2/6]  =

2[ 2/3 + 1/3]  =

2 [3/3] =

2 [1]  =

2