Alright, let's work through 7215 times 2557 step by step
7215 × 2557 = 2557 × (7215)
+ 2557 × 5 that equals 12785
+ 2557 × 10 resulting in 25570
+ 2557 × 200 yielding 511400
+ 2557 × 7000 that is equal 17899000

= 18448755
