Add a black calculator and a gray screen

•  Make the calculator bigger and the screen smaller

•  Remove the screen and add a result of 2 + 2 = 4

•  Change the result to 3 x 3 = 9

•  Add some buttons for numbers, operators, and functions

•  Change the color of the buttons to white with black symbols and labels

•  Add a wooden table and a notebook and a pen

•  Change the color of the notebook to blue and the pen to red

•  Add some soft and natural lighting and a shadow
