def calculate_excise_tax(price, tax_rate):
    return price * (tax_rate / 100)
 
def main():
    while True:  # ใช้ Loop Statement เพื่อให้โปรแกรมทำงานซ้ำได้
        try:
            price = float(input("Enter product price: "))
            tax_rate = float(input("Enter excise tax rate (%): "))
 
            tax = calculate_excise_tax(price, tax_rate)
            total_price = price + tax
 
            print(f"Excise Tax: {tax:.2f}")
            print(f"Total Price (including tax): {total_price:.2f}")
 
            repeat = input("Do you want to calculate again? (yes/no): ").strip().lower()
            if repeat != 'yes':
                print("Exiting program...")
                break
        except ValueError:
            print("Invalid input! Please enter numeric values.")# your code goes here

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