\"\"

\

 

\

The expression is \"\".

\

\"\"             (Commutative Property of Multiplication: \"\")

\

 

\

\"\"      (Associative Property of Multiplication: (a\"\"b)\"\"c = a\"\"(b\"\"c))

\

 

\

\"\"                   (Multiply: \"\")

\

\"\"                       (Multiply: \"\")

\

\"\"

\

The value of the expression is 540.