from tkinter import*
def povrsina():
    a=int(u1.get())/100
    b=int(u2.get())/1000
    pov=a*b
    rez1=Label(p,text=str(pov)+' metara četvornih',font=14)
    rez1.place(x=190,y=180)
    return
def volumen():
    a=int(u1.get())/100
    b=int(u2.get())/1000
    h=int(u3.get())/10
    v=a*b*h
    rez2=Label(p,text=str(v)+' metara kubičnih',font=14)
    rez2.place(x=190,y=220)
    return
def voda():
    a=int(u1.get())/10
    b=int(u2.get())/100
    h=int(u3.get())
    litre=a*b*h
    rez3=Label(p,text=str(litre)+' litara',font=14)
    rez3.place(x=190,y=260)
    return
p=Tk()
p.config(width=380, height=330)

t=Label(p,text='POVRŠINA I VOLUMEN',font=14)
t.place(x=100,y=20)

t1=Label(p,text='Unesi duljinu prostorije (cm):')
t1.place(x=30,y=70)
u1=Entry(p)
u1.place(x=200,y=70,width=120)

t2=Label(p,text='Unesi širinu prostorije (mm):')
t2.place(x=30,y=100)
u2=Entry(p)
u2.place(x=200,y=100, width=120)

t3=Label(p,text='Unesi visinu prostorije (dm):')
t3.place(x=30,y=130)
u3=Entry(p)
u3.place(x=200,y=130, width=120)

g1=Button(p,text='Površina poda',command=povrsina)
g1.place(x=35,y=180,width=140)
g2=Button(p,text='Volumen prostorije',command=volumen)
g2.place(x=35,y=220,width=140)
g3=Button(p,text='Količina vode',command=voda)
g3.place(x=35,y=260,width=140)



p.mainloop()