@startuml actor User participant "User Interface" as UI participant "JavaScript Code" as JavaScript participant "Calculation Engine" as CalculationEngine activate UI User -> UI: Clicks on buttons UI -> JavaScript: Interacts with buttons activate JavaScript JavaScript -> UI: Updates display and DOM JavaScript -> JavaScript: Sends input to Calculation Engine activate CalculationEngine JavaScript <-- CalculationEngine: Receives result deactivate CalculationEngine JavaScript -> UI: Displays result deactivate JavaScript deactivate UI @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art