Question (Thai):  ผู้ที่ซื้อ Garmin Forerunner ดำเนินการ Ticket ID  กี่ใบ
Question (English): How many ticket ID were conducted by the person who purchased Garmin Forerunner?
Table: customer
Pandas: df[df['Product_Purchased'] == 'Garmin Forerunner'].shape[0]