This template is for creating interactive calculators. It requires the calculator gadget. The calculator works by default. You can opt out at: Preferences > Gadgets > Template Gadgets > Enables javascript Calculator template. All pages using this system are added to Category:Pages using gadget Calculator.
You can use this template multiple times on a page to make input widgets, with some of the widgets using also the results of other widgets, like a spreadsheet cell that does a computation based on results of computations in other cells.
You can use {{Calculator label}} to mark text as a label for a calculator widget.
Statistics for this template are available at graphite