Alright, let's work through 1280 times 3487 step by step
1280 × 3487 = 3487 × (1280)
+ 3487 × 0 that equals 0
+ 3487 × 80 giving us 278960
+ 3487 × 200 yielding 697400
+ 3487 × 1000 giving us 3487000

= 4463360
