
from kivy.uix.screenmanager import Screen

from kivymd.app import MDApp
from kivymd.uix.button import MDRectangleFlatButton

class MortgageCalculatorApp(MDApp):
    def build(self):
        screen = Screen()
        screen.add_widget(
            MDRectangleFlatButton(
                text = "Hello, MortgageCalculatorApp!",
                pos_hint = {"center_x": 0.5, "center_y": 0.5},
                )
            )
        return screen


MortgageCalculatorApp().run()