Divide textField in swift

Question

The functions below perform independently for the first two text inputs then are intended to follow up in the output: Volume Divided. How might an individual achieve this in Swift for MacOS(Xcode13)?

func cubemassatomscale(cubemassatomscaleresult: Double) -> Double {  (((2 / (cbrt(1 * 2))) + radicalmassscale) - 1) + radicalmassscale  }

func volscale(volscaleresult:Double) -> Double { cubemassatomscale / radicalvolscale }


Text("Volume + Sigcothian:")
                        .font(.callout)
                        .bold()
                       // .colorInvert()
                    TextField("#", value: self.$radicalmassscale, formatter: formatter)
                        //.colorInvert()
                    
                        .textFieldStyle(RoundedBorderTextFieldStyle())
                        .overlay(
                                RoundedRectangle(cornerRadius: 6)
                                    .stroke(Color.blue, lineWidth: 2)
                            )
                    TextField("#", value: self.$radicalvolscale, formatter: formatter)
                    //.colorInvert()
                
                    .textFieldStyle(RoundedBorderTextFieldStyle())
                    .overlay(
                            RoundedRectangle(cornerRadius: 6)
                                .stroke(Color.blue, lineWidth: 2)
                        )
                        
                    Text("Volume Divided: \(volscale(volscaleresult: volscale))")
                        .font(.callout)
                        .bold()
                        .frame(width: 150, height: 60, alignment: .leading)
                        //.colorInvert()
                }.padding()
                    Divider()

Answer 1

You could try this approach using ObservableObject model like in this example, where calculations are not mixed into the UI:

import SwiftUI

@main
struct MacApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

class VolModel: ObservableObject {
    @Published var radicalmassscale: Double = 0.0 {
        didSet { updateVolscale() }
    }
    @Published var radicalvolscale: Double = 0.0 {
        didSet { updateVolscale() }
    }
    @Published var volscale: Double = 0.0
 
    func updateVolscale() {
        let cubemassatomscale = (((2 / (cbrt(1 * 2))) + radicalmassscale) - 1) + radicalmassscale
        volscale = cubemassatomscale / radicalvolscale
    }
}

struct ContentView: View {
    let formatter = NumberFormatter()
    @StateObject var volModel = VolModel()
    
    var body: some View {
        VStack {
            Text("Volume + Sigcothian:").font(.callout).bold()
            
            TextField("#", value: $volModel.radicalmassscale, formatter: formatter)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .overlay(RoundedRectangle(cornerRadius: 6).stroke(Color.blue, lineWidth: 2))
            
            TextField("#", value: $volModel.radicalvolscale, formatter: formatter)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .overlay(RoundedRectangle(cornerRadius: 6).stroke(Color.blue, lineWidth: 2))
            
            Text("Volume Divided: \(volModel.volscale)").font(.callout).bold()
                .frame(width: 180, height: 80, alignment: .leading)
            
        }.padding()
    }
    
}