1. **State the problem:** Calculate the product of 10 and 2. 2. **Formula used:** Multiplication of two numbers is given by $a \times b$. 3. **Apply the formula:** Here, $a=10$ and $b=2$, so we calculate $10 \times 2$. 4. **Intermediate work:** $$10 \times 2 = 20$$ 5. **Explanation:** Multiplying 10 by 2 means adding 10 two times, which equals 20. 6. **Final answer:** $$20$$