diff --git a/API.md b/API.md
index a9d8824..4bd3d6a 100644
--- a/API.md
+++ b/API.md
@@ -582,7 +582,7 @@ After that multiply the result by 1000:
 Time.now.to_i * 1000     # => 1383582043000
 # ActiveSupport examples:
 DateTime.now.to_i * 1000 # => 1383582043000
-ActiveSupport::TimeZone.new('Asia/Shanghai').now.to_i * 100
+ActiveSupport::TimeZone.new('Asia/Shanghai').now.to_i * 1000
 # => 1383582043000
 ```