Alright, let's work through 2509 times 7118 step by step
2509 × 7118 = 7118 × (2509)
+ 7118 × 9 producing 64062
+ 7118 × 00 that is equal 0
+ 7118 × 500 that is equal 3559000
+ 7118 × 2000 giving us 14236000

= 17859062
