Fix github stupid bug

Author: theEmbeddedGeorge

Interview/Algorithm/algorithm_prepare.md

@@ -1360,8 +1360,10 @@ public:
 
 private:
     string digits[20] = {"", "One ", "Two ", "Three ", "Four ", "Five ", "Six ", "Seven ", "Eight ", "Nine ", "Ten ", "Eleven ", "Twelve ", "Thirteen ", "Fourteen ", "Fifteen ", "Sixteen ", "Seventeen ", "Eighteen ", "Nineteen "};
+    
     string tens[10] = {"", "Ten ", "Twenty ", "Thirty ", "Forty ", "Fifty ", "Sixty ", "Seventy ", "Eighty ", "Ninety "};
-    pair<int, string> units[4] = {{1000000000, "Billion "}, {1000000, "Million "}, {1000, "Thousand "}, {100, "Hundred "}};
+
+    pair<int, string> units[4] = {{1000*1000*1000, "Billion "}, {1000*1000, "Million "}, {1000, "Thousand "}, {100, "Hundred "}};
 };
 ```
 ### **Reorder list**