Settings

Chain Mode :             Calculations in Chain mode are interpreted in the order in which they are entered. 

For example,

              if you enter 1 + 2 * 3

first  + operator will be executed and then * . So the answer will be   9.

              In Chain mode, if you wish to override the left to right order of entry, use parentheses () to prioritize operations. 

For example, to calculate 1+ (2 x 3),