Terminated: unknown
This calculator (as do many other CASIO scientific calculators) uses one and the same key for both the constant π as well as exponents. This works as follows. When you first enter digits, the EXP key will enable you to enter the exponent, otherwise it will enter the constant π.
As a calculator this one is great. It has almost everything you’ll ever need, including binary/hexadecimal/octal calculations, all kinds of statistical functions, and also has the familiar programming language also found in similar CASIO calculators.