Alright, let's work through 7158 times 7521 step by step
7158 × 7521 = 7521 × (7158)
+ 7521 × 8 producing 60168
+ 7521 × 50 yielding 376050
+ 7521 × 100 which equals 752100
+ 7521 × 7000 that results in 52647000

= 53835318
