diff --git a/12_30/featureproduct.py b/12_30/featureproduct.py
new file mode 100644
index 00000000..8caebc64
--- /dev/null
+++ b/12_30/featureproduct.py
@@ -0,0 +1,8 @@
+def piro(product):
+    return 1+2+product(product)
+
+def product():
+    return 4
+
+def payment():
+    return 5
\ No newline at end of file