Yes, using the CAL command. To use the result of CAL in a command, call it transparently with 'CAL (a leading apostrophe)
You can also use lisp statements on the command line, you just need to learn its syntax -enclose in parentheses, operator first. Your example:
(/ .4136 2)
be careful in division, if you use all integers the result will be an integer, for example
(/ 5 2)
will give you 2, not 2.5