Simple PHP calculator

Question

I\'m creating a basic PHP calculator that lets you enter two values and chose your operator then displays the answer. Everything is working fine except it\'s not outputting

Answer 1

    
        
         
    


    

    
Calculator
    
This is a calculator made by Hau Teen Yee Fabrice and is free to use.
        

     
 Multiplication: * 
     
 Substraction: - 
     
 Division: / 
     
 Addition: + 
        
     
Enter first number:
        
        
Enter second number:
        
        
Enter the calculator symbol
        
        Calculate