import tkinter as tk

root = tk.Tk()

margin = 0.23
projectedSales = tk.IntVar()
profit = tk.IntVar()

entry = tk.Entry(root, textvariable=projectedSales)

entry.pack()


def profit_calculator():
    profit.set(margin * projectedSales.get())


labelProSales = tk.Label(root, textvariable=projectedSales)
labelProSales.pack()

labelProfit = tk.Label(root, textvariable=profit)
labelProfit.pack()

button_calc = tk.Button(root, text="Calculate", command=profit_calculator)
button_calc.pack()

root.mainloop()
