In previous versions of Ubuntu, I used a calculator scope from some PPA. It was very nice, worked snappily and generally behaved like calc.
13.10 has it's own calculator, which can be used, but it stopped working after I disabled web results with unity tweak tool. Even when it was working, it was sluggish, as if it only used the calculator if it found nothing else anywhere.
I can still use the calculator by typing
or enabling it from the filter results -menu.
But those options defeat the purpose.
How do I enable the calculator scope to always be triggered by default?