[Question]Mckenna starts her day at 8:00 a.m. She works in her office up to 11:00 a.m. then joins her team of developers at the conference room to talk about projects up to 13:00, from which she works for another two hours and then heads home. How many hours does Mckenna stay at work?
[Answer]From 8:00 to 11:00, Mckenna spends 11:00 - 8:00 = 3 hours at work. When she joins the developers in the conference room for the meeting, she spends an additional 13:00 - 11:00 = 2 hours at work. So far, she has spent 3 + 2 = 5 hours at work. When she works for an additional 2 hours before heading home, her total work hours become 5 + 2 = 7 hours. The answer is 7.

[Question]At the bookstore, Sarah bought 6 paperback books and 4 hardback books. Her brother bought one-third as many paperback books as Sarah bought, and two times the number of hardback books that she bought. How many books did her brother buy in total?
[Answer]Her brother bought 6 / 3 = 2 paperbacks. He bought 4 * 2 = 8 hardbacks. In total he bought 2 + 8 = 10 books. The answer is 10.

[Question]The difference between the number of boys and girls in a tree planting event is 400. If there are 600 boys at the event, and the number of girls is more than the number of boys, what's 60% of the total number of boys and girls at the event?
[Answer]If there are 600 boys at the event, and the difference between boys and girls is 400, there are 600 + 400 = 1000 girls. The total number of boys and girls at the event is 1000 + 600 = 1600. 60% of the total number of boys and girls at the event is 60 / 100 * 1600 = 960. The answer is 960.

[Question]Linda is building a new hotel with two wings. The first wing has 9 floors and each floor has 6 halls each with 32 rooms. The second wing has 7 floors each with 9 halls with 40 rooms each. How many rooms are in the hotel total?
[Answer]
First find the number of rooms per floor in the first wing: 32 rooms / hall * 6 halls / floor = 192 rooms / floor. Then find the total number of rooms in the first wing by multiplying that number by the number of floors: 192 rooms / floor * 9 floors = 1728 rooms. Then find the number of rooms per floor in the second wing: 40 rooms / hall * 9 halls / floor = 360 rooms / floor. Then find the total number of rooms in the second wing by multiplying that number by the number of floors: 360 rooms / floor * 7 floors = 2520 rooms. Then add the total number of rooms in each wing to find the overall total: 1728 rooms + 2520 rooms = 4248 rooms. The answer is 4248.