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abstraction > mathematical concept > number > constant > unit prefix > exa
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exa
(E)
subjectfact 
exahas symbol E2001-09-27 09:32:57.0
has value 10182001-09-27 09:32:57.0
is an instance of unit prefix2001-09-27 09:32:57.0
unit prefixhas rule
  1. multiple prefixes may not be used
  2. any unit prefix can be used with any SI unit
2001-09-27 09:32:57.0