Task: Program Execution
Input (English): [47, 64, 31, -87, 54, -34, -40, 19, -35, 40, 91, -82, -80, 57]
Output (English): [55.5, 47.5, -28.0, -16.5, 10.0, -37.0, -10.5, -8.0, 2.5, 65.5, 4.5, -81.0, -11.5]