$\begin{array}{l}6 * 7 \\ 15 * 8\end{array}$

Step 1 ：Calculate the product of 6 * 7: \(6 \times 7 = 42\)

Step 2 ：Calculate the product of 15 * 8: \(15 \times 8 = 120\)

Step 3 ：\boxed{\text{Final Answer: 6 * 7 = 42, 15 * 8 = 120}}