14 cm²
Step-by-step explanation:
Area of square = Side * side
             = 2 * 2
             = 4 cm²
Area of rectangle = length * width
               = 6 * 3
               = 18 cm²
Area of shaded portion(yellow portion)=Area of rectangle - area of square
                                = 18 - 4
                                = 14 cm²