What is the relationship between the astronomical calendar of Shang Dynasty and the development of mathematics?

The astronomical calendar of Shang Dynasty has made great progress, which is related to the development of mathematics. But at that time, most of the research on this knowledge was for the convenience of divination. The number in Oracle Bone Inscriptions has reached 30,000. Unearthed cultural relics also show that at that time, general arithmetic operations could be carried out and some geometric figures could be drawn, so mathematics has also become an important part of teaching.