Embarrassingly simple BMI calculator

bmiapp.py

from tkinter import *
from PIL import Image, ImageTk

window = Tk()
window.title("BMI Calculator")
window.geometry('720x1000')

lbl = Label(window, text = "Welcome to the BMI Calculator!", font = ("System", 20))
lbl.grid(column = 0, row = 0, columnspan = 2)

hlbl = Label(window, text = "Height (cm)", font = ("System", 14))
hlbl.grid(column = 0, row = 2)
height = Entry(window, width = 10, font = ("System", 14))
height.grid(column = 1 , row = 2)

wlbl = Label(window, text = "Weight (kg)", font = ("System", 14))
wlbl.grid(column = 0, row = 4)
weight = Entry(window, width = 10, font = ("System", 14))
weight.grid(column = 1 , row = 4)

r = Label(window, text = "Your BMI is", font = ("System", 14))
r.grid(column = 0, row = 12, columnspan = 2)

resultlabel = Label(window, text = "", font = ("System", 26))
resultlabel.grid(column = 0, row = 14, columnspan = 2)

condition = Label(window, text = "", font = ("System", 20))
condition.grid(column = 0, row = 16, columnspan = 2)

def clicked():
    w = int(weight.get())
    h = int(height.get())
    bmi = w / ((h / 100) ** 2)
    result = str(bmi)
    resultlabel.configure(text = result)
    if (bmi <= 18):
        condition.configure(text = "You are UNDERWEIGHT!")
    elif (bmi < 25):
        condition.configure(text = "You are HEALTHY!")
    elif (bmi < 30):
        condition.configure(text = "You are OVERWEIGHT!")
    elif (bmi < 40):
        condition.configure(text = "You are OBESE!")
    else:
        condition.configure(text = "You are EXTREMELY OBESE!")


calculate = Button(window, text = "Calculate!", bg = "black", fg = "black", command = clicked, font = ("System",16), width = 30)
calculate.grid(column = 0, row = 8, columnspan = 2)

image = Image.open("bmi-chart.png").resize((700, 500), Image.ANTIALIAS)
photo = ImageTk.PhotoImage(image)

label = Label(image=photo)
label.image = photo # keep a reference!
label.grid(column = 0, row = 118, columnspan = 2)


window.mainloop()