1. The problem asks to find the number of hours between 19 Feb 10am and 23 Feb 10am. 2. We calculate the difference in days first: from 19 Feb to 23 Feb is 4 days. 3. Each day has 24 hours, so multiply the number of days by 24 hours/day. 4. Calculate: $$4 \times 24 = 96$$ hours. 5. Since the time is exactly from 10am to 10am, no additional hours need to be added or subtracted. 6. Therefore, the total number of hours between 19 Feb 10am and 23 Feb 10am is $$96$$ hours.