Alright, let's work through 2871 times 6240 step by step
2871 × 6240 = 6240 × (2871)
+ 6240 × 1 that equals 6240
+ 6240 × 70 resulting in 436800
+ 6240 × 800 that is equal 4992000
+ 6240 × 2000 which equals 12480000

= 17915040
