Result = expression1 operator expression2
operator:
the name of the operator
expression1, expression2 are the arguments (i.e. inputs):
maps
expressions resulting in a map (i.e., nesting of expressions is possible)
Result is the return value (i.e. what is created):
one map
Example, multiply two maps (for each cell), arguments are maps:
MapA = MapB * MapC
Example, multiply maps (for each cell), second arguments is another expressions:
MapA = MapB * (MapC+MapD)