If you have a set of data, simply high-lite the column or row and then click on the Explore button (bottom right corner). You will see information come up instantly as well as the ability to ask a question such as, "what is the average of this column"? You do not need to know the exact formula (although the option is there to see what the formula is).
Embedded below you will see a 1 minute and 7 second YouTube video briefly showing what the feature looks like.
As always, any questions please let me know!