Similarly it could be shown that 50,721 or 69,701 counted forward or backward from any starting point would both reach this same terminal date, since subtracting 2 Calendar Rounds, 37,960 (see Table XVI), from the first, and 3 Calendar Rounds, 56,940 (see Table XVI), from the second, there would remain in each case 12,761. The student will find his calculations greatly facilitated if he will apply this rule whenever possible. To familiarize the student with the working of these rules, it is thought best to give several additional examples involving their use. {144} TABLE XVI. 80 CALENDAR ROUNDS EXPRESSED IN ARABIC AND MAYA NOTATION +--------+---------+-----------------+ |Calendar| Days| Cycles, Etc.| | Rounds| | | +--------+---------+-----------------+ | 1| 18,980| 2. 12. 13. 0| +--------+---------+-----------------+ | 2| 37,960| 5. 5. 8. 0| +--------+---------+-----------------+ | 3| 56,940| 7. 18. 3. 0| +--------+---------+-----------------+ | 4| 75,920| 10. 10. 16. 0| +--------+---------+-----------------+ | 5| 94,900| 13. 3. 11. 0| +--------+---------+-----------------+ | 6| 113,880| 15. 16. 6. 0| +--------+---------+-----------------+ | 7| 132,860| 18. 9. 1. 0| +--------+---------+-----------------+ | 8| 151,840| 1. 1. 1. 14. 0| +--------+---------+-----------------+ | 9| 170,820| 1. 3. 14. 9. 0| +--------+---------+-----------------+ | 10| 189,800| 1. 6. 7. 4. 0| +--------+---------+-----------------+ | 11| 208,780| 1. 8. 19. 17. 0| +--------+---------+-----------------+ | 12| 227,760| 1. 11. 12. 12. 0| +--------+---------+-----------------+ | 13| 246,740| 1. 14. 5. 7. 0| +--------+---------+-----------------+ | 14| 265,720| 1. 16. 18. 2. 0| +--------+---------+-----------------+ | 15| 284,700| 1. 19. 10. 15. 0| +--------+---------+-----------------+ | 16| 303,680| 2. 2. 3. 10. 0| +--------+---------+-----------------+ | 17| 322,660| 2. 4. 16. 5. 0| +--------+---------+-----------------+ | 18| 341,640| 2. 7. 9. 0. 0| +--------+---------+-----------------+ | 19| 360,620| 2. 10. 1. 13. 0| +--------+---------+-----------------+ | 20| 379,600| 2. 12. 14. 8. 0| +--------+---------+-----------------+ | 21| 398,580| 2. 15. 7. 3. 0| +--------+---------+-----------------+ | 22| 417,560| 2. 17. 19. 16. 0| +--------+---------+-----------------+ | 23| 436,540| 3. 0. 12. 11. 0| +--------+---------+-----------------+ | 24| 455,520| 3. 3. 5. 6. 0| +--------+---------+-----------------+ | 25| 474,500| 3. 5. 18. 1. 0| +--------+---------+-----------------+ | 26| 493,480| 3. 8. 10. 14. 0| +--------+---------+-----------------+ | 27| 512,460| 3. 11. 3. 9. 0|