Please Help! Please write a detailed explanation of how you got your answer!!! Please don't write fake answers just for points. I just want some help on homework, I asked for a detailed explanation so I can understand the subject better next time. I really don't want just the answer. Thank You!

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?