Basic
arithmetic operators


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       There are five basic arithmetic operators in this calculator :

    


    

    
 + 
               add the content of register x and register y, 
               store the result in register x and remove y

    
 - 
               substract the content of register x from register y, 
               store the result in register x and remove y

    
 * 
               multiply the content of register x and register y, 
               store the result in register x and remove y

    
 / 
               divide the content of register y by the content of register x, 
               store the result in register x and remove y

    
 y**x 
               elevate register y to the power in x, 
               store the result in register x and remove y