Where's the Calculator app on my Iphone 5?

Ok I haven't deleted it or anything, I cannot se it on my app-list but when I search for it, it comes up as a top hit. This is the first Iphone I have owned so could someone please tell me

Added (1). *see

It might be in a utilities folder on your first page of apps. If not try going in settings-general-restrictions-make a password-apps-don't allow apps. Go to your home screen then go back to restrictions and allow all apps and it might appear.