diff --git a/calculator.py b/calculator.py
new file mode 100644
index 0000000..df087f8
--- /dev/null
+++ b/calculator.py
@@ -0,0 +1,112 @@
+import tkinter as tk
+
+# 创建主窗口
+root = tk.Tk()
+root.title("Simple Calculator")
+
+# 输入框
+entry = tk.Entry(root, width=35, borderwidth=5)
+entry.grid(row=0, column=0, columnspan=3, padx=10, pady=10)
+
+# 定义按钮的功能
+def button_click(number):
+    current = entry.get()
+    entry.delete(0, tk.END)
+    entry.insert(0, str(current) + str(number))
+
+def button_clear():
+    entry.delete(0, tk.END)
+
+def button_add():
+    first_number = entry.get()
+    global f_num
+    global math
+    math = "addition"
+    f_num = float(first_number)
+    entry.delete(0, tk.END)
+
+def button_equal():
+    second_number = entry.get()
+    entry.delete(0, tk.END)
+    
+    if math == "addition":
+        entry.insert(0, f_num + float(second_number))
+    elif math == "subtraction":
+        entry.insert(0, f_num - float(second_number))
+    elif math == "multiplication":
+        entry.insert(0, f_num * float(second_number))
+    elif math == "division":
+        if float(second_number) != 0:
+            entry.insert(0, f_num / float(second_number))
+        else:
+            entry.insert(0, "Error")
+
+def button_subtract():
+    first_number = entry.get()
+    global f_num
+    global math
+    math = "subtraction"
+    f_num = float(first_number)
+    entry.delete(0, tk.END)
+
+def button_multiply():
+    first_number = entry.get()
+    global f_num
+    global math
+    math = "multiplication"
+    f_num = float(first_number)
+    entry.delete(0, tk.END)
+
+def button_divide():
+    first_number = entry.get()
+    global f_num
+    global math
+    math = "division"
+    f_num = float(first_number)
+    entry.delete(0, tk.END)
+
+# 定义按钮
+button_1 = tk.Button(root, text="1", padx=40, pady=20, command=lambda: button_click(1))
+button_2 = tk.Button(root, text="2", padx=40, pady=20, command=lambda: button_click(2))
+button_3 = tk.Button(root, text="3", padx=40, pady=20, command=lambda: button_click(3))
+button_4 = tk.Button(root, text="4", padx=40, pady=20, command=lambda: button_click(4))
+button_5 = tk.Button(root, text="5", padx=40, pady=20, command=lambda: button_click(5))
+button_6 = tk.Button(root, text="6", padx=40, pady=20, command=lambda: button_click(6))
+button_7 = tk.Button(root, text="7", padx=40, pady=20, command=lambda: button_click(7))
+button_8 = tk.Button(root, text="8", padx=40, pady=20, command=lambda: button_click(8))
+button_9 = tk.Button(root, text="9", padx=40, pady=20, command=lambda: button_click(9))
+button_0 = tk.Button(root, text="0", padx=40, pady=20, command=lambda: button_click(0))
+
+button_add = tk.Button(root, text="+", padx=39, pady=20, command=button_add)
+button_equal = tk.Button(root, text="=", padx=91, pady=20, command=button_equal)
+button_clear = tk.Button(root, text="Clear", padx=79, pady=20, command=button_clear)
+
+button_subtract = tk.Button(root, text="-", padx=41, pady=20, command=button_subtract)
+button_multiply = tk.Button(root, text="*", padx=40, pady=20, command=button_multiply)
+button_divide = tk.Button(root, text="/", padx=41, pady=20, command=button_divide)
+
+# 将按钮放置在屏幕上
+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_clear.grid(row=4, column=1, columnspan=2)
+button_add.grid(row=5, column=0)
+button_equal.grid(row=5, column=1, columnspan=2)
+
+button_subtract.grid(row=6, column=0)
+button_multiply.grid(row=6, column=1)
+button_divide.grid(row=6, column=2)
+
+# 运行主循环
+root.mainloop()