Alright, let's work through 1387 times 3488 step by step
1387 × 3488 = 3488 × (1387)
+ 3488 × 7 giving us 24416
+ 3488 × 80 yielding 279040
+ 3488 × 300 producing 1046400
+ 3488 × 1000 what gives us 3488000

= 4837856
