1. **State the problem:** Calculate the number of hours from 14 Feb 6pm to 19 Feb 10am. 2. **Understand the time intervals:** - From 14 Feb 6pm to 15 Feb 6pm is exactly 24 hours. - From 15 Feb 6pm to 18 Feb 6pm is 3 full days, each 24 hours, so $3 \times 24 = 72$ hours. - From 18 Feb 6pm to 19 Feb 6am is 12 hours. - From 19 Feb 6am to 19 Feb 10am is 4 hours. 3. **Add all intervals:** $$24 + 72 + 12 + 4 = 112$$ 4. **Final answer:** There are **112 hours** from 14 Feb 6pm to 19 Feb 10am.