#include <stdio.h>
    /* Pocket calculator example using case statement */
    void main() {
        float Result, Value; 
        char Operator;
        
        scanf("%f",&Result);
        
        while ((Operator=getchar()) != '=') {
            scanf("%f",&Value);
            
            switch (Operator) {
    case '+':    Result = Result + Value; 
    			 break;
    			 
    case '-':    Result = Result - Value; 
                 break;
                 
    case '*':    Result = Result * Value; 
                 break;
                 
    case '/':    Result = Result / Value; 
                 break;
            }
        }
        printf("%f\n",Result);
    }