Alright, let's work through 1337 times 387 step by step
1337 × 387 = 387 × (1337)
+ 387 × 7 which equals 2709
+ 387 × 30 resulting in 11610
+ 387 × 300 that is equal 116100
+ 387 × 1000 that results in 387000

= 517419
