Key Features: Standard Calculator Functions: Performs basic arithmetic operations like addition, subtraction, multiplication, and division, ideal for everyday calculations. Advanced GST Calculation: Customised for Indian users, it accurately calculates GST at various rates (+3%, +5%, +12%, +18%, +28%, -3%, -5%, -12%, -18%, -28%). This functionality allows adding or subtracting GST from the input, showing both net and gross amounts. Percentage Calculations: Efficiently handles percentage calcu