The Wolfram System provides you with numerous ways to generate Quantity expressions using natural language input.
Use free-form input to automatically interpret units using natural language:
Use () to embed free-form input with units into any expression:
Wolfram Language code: UnitConvert[["earths gravity"], "SIBase"]Wolfram Language code: Mean[{["mole of calcium nitrate in kg"], ["mole of water in kg"], ["1/2 mole of sodium chloride in lbs"]}]Wolfram Language code: Solve[["earths gravity"] == x / ["3.2 minutes"], x]Wolfram Language code: Solve[["10 mph"]t == (1/2)["earths gravity in SI"]t^2 && t > 0, t]