from tkinter import *


class Block:
    def __init__(self, master):
        self.e1 = Entry(master, background="yellow", width=50)
        self.e2 = Entry(master, background="yellow", width=50)
        self.b_add = Button(master, text="Сложить", height=3)
        self.b_sub = Button(master, text="Вычесть", height=3)
        self.b_mul = Button(master, text="Умножить", height=3)
        self.b_div = Button(master, text="Разделить", height=3)
        self.l_result = Label(master, bg='black', fg='white', width=30, height=5)
        self.e1.pack()
        self.e2.pack()
        self.b_add.pack()
        self.b_sub.pack()
        self.b_mul.pack()
        self.b_div.pack()
        self.l_result.pack()
        self.b_add['command'] = self.add
        self.b_sub['command'] = self.sub
        self.b_mul['command'] = self.mul
        self.b_div['command'] = self.div

    def add(self):
        try:
            fa = self.e1.get()
            sa = self.e2.get()
            self.l_result["text"] = f"{fa} + {sa} = {float(fa) + float(sa)}"
        except:
            self.l_result["text"] = "Что то пошло не так"

    def sub(self):
        try:
            fa = self.e1.get()
            sa = self.e2.get()
            self.l_result["text"] = f"{fa} - {sa} = {float(fa) - float(sa)}"
        except:
            self.l_result["text"] = "Что то пошло не так"

    def mul(self):
        try:
            fa = self.e1.get()
            sa = self.e2.get()
            self.l_result["text"] = f"{fa} * {sa} = {float(fa) * float(sa)}"
        except:
            self.l_result["text"] = "Что то пошло не так"

    def div(self):
        try:
            fa = self.e1.get()
            sa = self.e2.get()
            self.l_result["text"] = f"{fa} / {sa} = {float(fa) / float(sa)}"
        except:
            self.l_result["text"] = "Что то пошло не так"


root = Tk()

calc = Block(root)

root.mainloop()