1. There are 16 cakes. Each cake is cut into 7 parts. Each part is further cut into 3 pieces. How many cake pieces are there in all?   2. There are 3 balloons in a bag. There are 5 bags in one box. How many balloons are there in 13 boxes?   3. Everyday   Herbert   exercises 30 minutes in the morning and 16 minutes in the evening. How many minutes does he exercise in 3 days?   4. A school has 5 dining halls. Each dining hall has12 tables. If there are four children to each table, how many children stay for lunch?   5. There are 4 paintings on each of three walls of a room. If an art gallery has 34 such rooms, how many paintings are there in its collection?