Simple Calculator UItextField Two Input Swift 4

This time is a little example for code calculator, using only simple code, ok try to see the script below, you can try it quite simple.

//from original data

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var label1: UITextField!
    @IBOutlet weak var label2: UITextField!
    
    @IBOutlet weak var sum: UILabel!
    
    override func viewDidLoad() {
        super.viewDidLoad()
    
        
     
    }
    @IBAction func multiplied(_ sender: UIButton) {
        self.sum.text = String(Int(label1.text!)! * Int(label2.text!)!)
    }
    
    @IBAction func divided(_ sender: UIButton) {
        self.sum.text = String(Int(label1.text!)! / Int(label2.text!)!)
    }
    
    @IBAction func plus(_ sender: UIButton) {
        
        self.sum.text = String(Int(label1.text!)! + Int(label2.text!)!)
        // example another way
        let toint = Int(label1.text!)!
        let toint2 = Int(label2.text!)!
        let toString = String(toint + toint2)
        self.sum.text = toString
    }
    
    @IBAction func subtracted(_ sender: UIButton) {
        self.sum.text = String(Int(label1.text!)! - Int(label2.text!)!)
    }
}