Final answer:
There are 27 different meals that can be selected at this restaurant.
Step-by-step explanation:
To calculate the number of different meals that can be selected at this restaurant, we can use the multiplication principle. There are 3 choices for the main course, 3 choices for the drink, and 3 choices for the dessert. Therefore, the number of different meals is 3 x 3 x 3 = 27.