Update app.py

app.py

@@ -1,13 +1,13 @@
 import gradio as gr
 
 def calculator(num1, operation, num2):
-    if operation == "add":
+    if operation == "+":
         return num1 + num2
-    elif operation == "subtract":
+    elif operation == "-":
         return num1 - num2
-    elif operation == "multiply":
+    elif operation == "*":
         return num1 * num2
-    elif operation == "divide":
+    elif operation == "/":
         return num1 / num2
 
 
@@ -15,7 +15,7 @@ demo = gr.Interface(
     fn=calculator,
     inputs=[
             gr.Number(value=4), 
-            gr.Radio(["add", "subtract", "multiply", "divide"]), 
+            gr.Radio(["+", "-", "*", "/"]), 
             "number"
             ],
     outputs="number",