From bef6a56d0621d8e5d131acb53fcef1c078d5449c Mon Sep 17 00:00:00 2001
From: fiatcode <fiatcode@posteo.com>
Date: Tue, 10 Feb 2026 09:16:38 +0700
Subject: [PATCH] GREEN: add coversion rule for 40

---
 lib/roman_numerals.dart | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/roman_numerals.dart b/lib/roman_numerals.dart
index f4666c1..abddc4d 100644
--- a/lib/roman_numerals.dart
+++ b/lib/roman_numerals.dart
@@ -1,5 +1,12 @@
 String integerToRoman(int number) {
-  const conversionRules = [(10, 'X'), (9, 'IX'), (5, 'V'), (4, 'IV'), (1, 'I')];
+  const conversionRules = [
+    (40, 'XL'),
+    (10, 'X'),
+    (9, 'IX'),
+    (5, 'V'),
+    (4, 'IV'),
+    (1, 'I'),
+  ];
 
   final result = StringBuffer();
   var remaining = number;