Why i am getting the bad geometry error in tkinter

from tkinter import Tk
root=Tk()
root.geometry("680×1200")

canvas = canvas(root,width =100,height=100)
canvas.grid(column=1,row=0)
photo = PhotoImage(file = "/storage/emulated/0/Documents/pixelLab/20220918_124806.png")
canvas.create_image(20,20,anchor=NW,image=img)