add output label

app.py

@@ -24,9 +24,11 @@ article = (
 )
 
 interface = gr.Interface(
-    fn=greet,
-    inputs="text",
-    outputs="text",
+    greet,
+    "text",
+    [
+        gr.outputs.Number(label="Public Key")
+    ],
     title="Ocean Token Calculator",
     description=description,
     article=article,