1. There are 19 cakes. Each cake is cut into 7 parts. Each part is further cut into 2 pieces. How many cake pieces are there in all?   2. The Professors at the State University drank 196 cups of tea yesterday. They drank 73 cups in the morning and 68 in the afternoon. How many did they drink in the evening?   3. Robin has a collection of 157 books. He donated 13 books last year and 28 books this year. How many books does he still have?   4. A school has 2 dining halls. Each dining hall has26 tables. If there are four children to each table, how many children stay for lunch?   5. Last month, Jack worked for 161 hours, Greg worked for 146 hours, and Edward worked 25 hours more than Jack. How many hours did they work altogether?