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multiply or divide, and select M+, M-, MR, and MC to perform 
relevant operations.  
 
Not e: This calculator has limited accuracy and rounding errors may occur 
especially in long division. Also use this option for unit and currency 
conversion and also a stopwatch. 
File manager 
Press OK to enter Menu>File manager. You can check all the folders in the 
memory card, create new ones or rename, delete the folders, etc.  
Not e: When you select Format, the data will be lost, so please be careful 
with this function.