diff --git a/example.lisp b/example.lisp
index cc076c8..cd3676d 100755
--- a/example.lisp
+++ b/example.lisp
@@ -1,2 +1,7 @@
 (print_str "hello world")
-(print_num (add 5 (divide 100 5)))
\ No newline at end of file
+
+(print_num (add 10 20))
+
+(printf "5 + (100 / 5) = %d\n" 
+    (add 5 
+        (divide 100 5)))
\ No newline at end of file