The expression "2 × 5 × 7 × 5" represents a multiplication of four numbers: 2, 5, 7, and 5. To solve this, you multiply the numbers together step by step. First, you can multiply 2 and 5 to get 10. Then, multiply 10 by 7 to get 70. Finally, multiply 70 by the second 5 to arrive at the final result. The complete calculation can be summarized as follows: 2 × 5 = 10, 10 × 7 = 70, and 70 × 5 = 350. Therefore, the product of "2 × 5 × 7 × 5" equals 350. This process illustrates how multiplication combines numbers to produce a larger value.