The expression "3 × 5 × 23" represents a multiplication problem involving three numbers: 3, 5, and 23. To solve it, you multiply these numbers together sequentially. First, you multiply 3 and 5, which equals 15. Then, you multiply 15 by 23 to find the final result. Calculating 15 × 23 gives you 345. Therefore, the product of the expression "3 × 5 × 23" is 345. This multiplication can be useful in various contexts, such as calculating total items in groups or understanding basic arithmetic operations.