Put the inputs in the boxes and choose the operation. Use PI [or 3.141592653589793] and NE [or 2.718281828459045 or exp(1)] instead of π and e [Euler's number].
Use A or B or C if you want to use previous output as input. Use M and Q
if you want to use data that you have written or copied in the M or Q box; Q is also used as "Pr" of the binomial distribution;
you can also add or multiply data by Q.
Use Round to round to units or digits after or before them.