Evaluating XPath Expresssions

XPath Result of XPath Evaluation
datatype of 2 + 2
xs:integer
datatype of 2.0 + 2.0
xs:decimal
datatype of 2.0 + 2
xs:decimal
datatype of 6 div 2
xs:integer
datatype of 6.0 div 2.0
xs:decimal
datatype of 6.0 div 2
xs:decimal