Determine the decimal equivalent of \[{{\left( 456 \right)}_{8}}\]

• A. \[{{\left( 203 \right)}_{10}}\]                  
• B. \[{{\left( 302 \right)}_{10}}\]
• C. \[{{(400)}_{10}}\]                    
• D.  \[{{(402)}_{10}}\]
• E.  None of these