user: Can you write code for a basic calculator with an interface?

assistant: It depends on the specific calculator that you have. If you have a TI-84 or FX 7900 GX then it would have a dedicated interface for programming.

user: No, not the programming language called BASIC.  I mean create a program that makes a calculator app.

assistant: Sorry for the confusion. There are a number of programming languages and frameworks that can be used to create a calculator with an interface, so without additional information, it's difficult to know which language or framework to use.

Here is a basic calculator program written in python:

```python
from tkinter import *

# Create a window
root = Tk()
root.title("Calculator")

# Define functions
def button_click(number):
    current = display.get()
    display.delete(0, END)
    display.insert(0, str(current) + str(number))

def clear():
    display.delete(0, END)

def add():
    first_number = display.get()
    global f_num
    global math_operation
    math_operation = "addition"
    f_num = int(first_number)
    display.delete(0, END)

def subtract():
    first_number = display.get()
    global f_num
    global math_operation
    math_operation = "subtraction"
    f_num = int(first_number)
    display.delete(0, END)

def multiply():
    first_number = display.get()
    global f_num
    global math_operation
    math_operation = "multiplication"
    f_num = int(first_number)
    display.delete(0, END)

def divide():
    first_number = display.get()
    global f_num
    global math_operation
    math_operation = "division"
    f_num = int(first_number)
    display.delete(0, END)

def equal():
    second_number = display.get()
    display.delete(0, END)

    if math_operation == "addition":
        display.insert(0, f_num + int(second_number))
    elif math_operation == "subtraction":
        display.insert(0, f_num - int(second_number))
    elif math_operation == "multiplication":
        display.insert(0, f_num * int(second_number))
    elif math_operation == "division":
        display.insert(0, f_num / int(second_number))

# Define display
display = Entry(root, width=35, borderwidth=5)
display.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

# Define buttons
button_1 = Button(root, text="1", padx=40, pady=20, command=lambda: button_click(1))
button_2 = Button(root, text="2", padx=40, pady=20, command=lambda: button_click(2))
button_3 = Button(root, text="3", padx=40, pady=20, command=lambda: button_click(3))
button_4 = Button(root, text="4", padx=40, pady=20, command=lambda: button_click(4))
button_5 = Button(root, text="5", padx=40, pady=20, command=lambda: button_click(5))
button_6 = Button(root, text="6", padx=40, pady=20, command=lambda: button_click(6))
button_7 = Button(root, text="7", padx=40, pady=20, command=lambda: button_click(7))
button_8 = Button(root, text="8", padx=40, pady=20, command=lambda: button_click(8))
button_9 = Button(root, text="9", padx=40, pady=20, command=lambda: button_click(9))
button_0 = Button(root, text="0", padx=40, pady=20, command=lambda: button_click(0))
button_add = Button(root, text="+", padx=39, pady=20, command=add)
button_subtract = Button(root, text="-", padx=41, pady=20, command=subtract)
button_multiply = Button(root, text="*", padx=40, pady=20, command=multiply)
button_divide = Button(root, text="/", padx=41, pady=20, command=divide)
button_equal = Button(root, text="=", padx=91, pady=20, command=equal)
button_clear = Button(root, text="Clear", padx=79, pady=20, command=clear)

# Put buttons on screen
button_1.grid(row=3, column=0)
button_2.grid(row=3, column=1)
button_3.grid(row=3, column=2)
button_4.grid(row=2, column=0)
button_5.grid(row=2, column=1)
button_6.grid(row=2, column=2)
button_7.grid(row=1, column=0)
button_8.grid(row=1, column=1)
button_9.grid(row=1, column=2)
button_0.grid(row=4, column=0)
button_add.grid(row=5, column=0)
button_subtract.grid(row=6, column=0)
button_multiply.grid(row=6, column=1)
button_divide.grid(row=6, column=2)
button_equal.grid(row=5, column=1, columnspan=2)
button_clear.grid(row=4, column=1, columnspan=2)

# Run the program
root.mainloop()
```