style - Classified contour-line visualization in SLD Geoserver

I have a problem with the Styling for the contour-lines. here is how I want to style them:

1. 4 different classes with different display zoom MaxScaleDenominator.


2. The interval is a variable (not fixed) based on user what to choose.


3. most important is Rule number 4 that shows all the contour-lines with the elevation higher than 500, but the most important part is, I don't want to show all bands(all lines) just each 5 band.(leads us to render fewer lines on the map, that is why I used the IEEERemainder).

But simply it doesn't work with the tag PropertyIsGreaterThan but it works with the PropertyIsEqualTo tag, but this tag problem is, doesn't work with interval ex. 43.

Is there any solution to fix it or another approach for my purpose?

      xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd"
    xmlns="http://www.opengis.net/sld"
    xmlns:ogc="http://www.opengis.net/ogc"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    
        CL
        
            

            CL
            
                
                    rule 1
                    
                    40000
                    
                        
                            #006600
                            1

                        
                    
                
                
                    rule 2
                    
                    
                        
                            
                                

                                    
                                        value
                                    
                                    
                                        50.0
                                    
                                
                                0
                            
                            

                                value
                                
                                    50
                                
                                
                                    200
                                
                            
                        
                    

                    120000
                    
                        
                            #8600b3
                            1
                        
                    
                
                
                    rule 3

                    
                    
                        
                            
                                
                                    value
                                
                                
                                    200.0
                                

                            
                            
                                200
                            
                            
                                500
                            
                        
                    
                    150000

                    
                        
                            #3366ff
                            1
                        
                    
                
                
                    Rule 4
                    

                    
                        
                            
                                
                                    value
                                
                                
                                    500.0
                                
                            

                            0
                        
                    
                    
                        
                            #ff0000
                            1