Several answers seem to think "*" isn't actually multiplication :-( . Follow the rules, folks!
see problem 242 for an example of how to disallow the use of specific characters (improving your testsuite is a better way to ask players to "follow the rules" of your problem in Cody)
Seems people can't read the rules. Trouble is that Cody's "test cases" can't test for existence of disallowed operators in the code.
Area of rhombus
Matrix to column conversion
Find Factrorial without using built-in function
Deleting an element in a matrix
Min by mean
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