From 5bf2839e33b5687d98008c9b66cfdfff928a77ed Mon Sep 17 00:00:00 2001
From: fiatcode <fiatcode@posteo.com>
Date: Tue, 10 Feb 2026 09:25:07 +0700
Subject: [PATCH] GREEN: add conversion rules for 400. 500. 900, and 1000

---
 lib/roman_numerals.dart | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/roman_numerals.dart b/lib/roman_numerals.dart
index f2bb0d8..cac6eb6 100644
--- a/lib/roman_numerals.dart
+++ b/lib/roman_numerals.dart
@@ -1,5 +1,9 @@
 String integerToRoman(int number) {
   const conversionRules = [
+    (1000, 'M'),
+    (900, 'CM'),
+    (500, 'D'),
+    (400, 'CD'),
     (100, 'C'),
     (90, 'XC'),
     (50, 'L'),