Put the inputs in the boxes and choose the operation.  Use pi instead of π.  Use A or B if you want to use previous output as input.  Use M if you want to use data that you have written or copied in the M box  [click here for a calculator with other keys]

=   A



=   B

M

Enter the data separated by commas  (each possibly followed by *... with ... its frequency)


=   C

Storing calculations (you can also annotate comments)