I am a novice user, trying to work through some examples given in book about Mathematica, and I am confused about the output I am receiving. Here is what I am entering, and the output is the same as my input - any idea what I am doing wrong? I have attached the notebook - called "Input equals output"

In[1]:= UnitConvert[26.2 mi, km]

Out[1]= UnitConvert[26.2 mi, km]

In[2]:= CurrencyConvert[$10 .00, Quantity[1, "Euros"]]

During evaluation of In[2]:= Quantity::compat: DimensionlessUnit and Euros are incompatible units

Out[2]= CurrencyConvert[0., Quantity[1, "Euros"]]