All you do is start Siri by pressing and holding the Home button. You’ll hear the two beeps, indicating that Siri’s listening. If you look at the screen you’ll see, to the right of “What can I help you with?”, a tiny gray-on-gray lower-case “i” in a circle. Here’s what it looks like (big red arrow added by me):
Tap that little gray-on-gray “i” in the circle and you get this:
Scroll down to reveal more:
That’s cool already. But wait, there’s more! If you touch an item in the list, you get a bunch of related examples. Here’s what you get when you touch “Call Jason.”
Here’s what you get when you touch “How many calories in a bagel?” (Note: there are a LOT of examples in that category– scroll down to see them all.)
Super stuff, and it’s built right in, available where and when you need it.
By the way, there are 207 calories in a bagel.