1. **State the problem:** Multiply 1.5 by 4.9. 2. **Formula used:** Multiplication of two numbers is given by $a \times b$. 3. **Calculate:** $$1.5 \times 4.9 = 7.35$$ 4. **Explanation:** Multiplying 1.5 by 4.9 means adding 1.5 to itself 4.9 times, which results in 7.35. **Final answer:** $7.35$