It means that it is impossible to get something for nothing, or the idea that even if something seems free, there is always a cost, no matter how indirect or hidden the cost is. 
        
             
        
        
        
9 total acres of land
5 1/4 equally sized portions
5 1/4x = 9 acres
 x = 9 acres/ 5 1/4
 x = 1.71 acres
        
                    
             
        
        
        
What are the exerpts above you dont have those