A round design that fits the hand naturally and slimly, making it easy to hold, with a solid cover that can be installed and removed in any direction for greater ease of use. Very visible results display, easy-to-press indicator keys and function keys. The keys are equipped with a rectangular design to increase ease of pressing. Their characters are also clearer to see thanks to their extra size. This calculator features the natural school book display format for displaying equations, calculations, and results exactly as they appear in schoolbooks.