By default Windows calculator doesn't support order of operation, to enable the functionality you need to activate the scientific view, let me show you how.
Float along Sunita Williams, Indian American astronaut who holds the record for longest space flight by a woman, and let her explain how they use the toilet, how they sleep, eat and other essentials.
Dropbox is an amazing cloud based web service enabling you to store your stuff like pictures and documents and access them from any device with an Internet connection. Plus you can share the stored items with others.
Is it really hard for you to ignore that beep sound of a new email, Facebook notification or a text message, are you experiencing an urge to share the latest photo to Instagram or send a new tweet?