Financial Calculations
Financial calculations (loans, savings) is a oft-needed calculation, and tricky to do by hand.
While you can use Excel-style functions (PMT), that is cumbersome. You can now do financial calculations in natural language:
Behind the scenes, Instacalc finds a keyword (loan), sees if relevant parameters are there (time period, rate, amount) and builds the function call. You can directly call loan(5%, 400k, 30 years) as well.