did you wrote this "menu = [["Ultimate Pepperoni Pizza",23], ["Chicken Bacon Pizza",21], ["Hawaiian Pizza",20],["BBQ Chicken Pizza",19],["Veggie Pizza",17],["Durian Pizza",27]]

def calculate_subtotal(price, quantity):
    subtotal = price * quantity
    return subtotal

print("Welcome to the Crust & Co Pizza Kitchen!")
print("This is the menu:")

for item in menu:
    print("Menu Item: " + item[0] + " Price: " + str(item[1]))

print("This is a program where you can improve your multiplication skills, please enter how much pizza you want and calculate the total cost by yourself.")
print("DO NOT USE A CALCULATOR")

selection = input("What type of pizza do you want? (Capitalize when needed): ")

pizza_price = 0
for item in menu:
    if selection == item[0]:
        pizza_price = item[1]
        break
if pizza_price == 0:
    print("Sorry, we don't provide that pizza.")
else:
    quantity = int(input("How many pizzas do you want? "))
    subtotal = calculate_subtotal(pizza_price, quantity)
elif:
  quantity2 = int(input ("What other pizza do you want?"))
    answer = int(input("What is the subtotal for " + str(quantity) + " " + selection + " pizzas? "))

    while answer != subtotal:
        print("Incorrect! Please try again.")
        answer = int(input("What is the subtotal for " + str(quantity) + " " + selection + " pizzas? "))
    print("Correct!")
    print("The subtotal for " + str(quantity) + " " + selection + " pizzas is: " + str(subtotal))"