甲、乙、丙、丁四人共同生产一批零件，甲生产的占其他三人生产总数的2/13，乙生产的占其他三人生产总数的1/4，丙生产的占其他三人生产总数的4/11.已知丁生产了60个，甲、乙、丙、丁各生产零件多少个？

推荐阅读：
The Best Productivity Trends and Hacks of 2015　 3 Great New Ways Of Generating Money With Content Online　 Local SEO 101 For Law Firms [Infographic]　 Make Sure You’re On Top of Google’s Mobile-Friendly Algorithm　 Best Tools and Apps for Travel Bloggers　 On-Page Optimization Tips to Complement Your Great Content　 Responsive Design for Newbies [Infographic]　 Tips To Improving Website Runtime　 How to Insert into a Binary Search Tree (Recursive and Iterative　 The FizzBuzz Example in Magik Programming Language